diff --git a/csfunctions/events/__init__.py b/csfunctions/events/__init__.py
index a7326a8..2429600 100644
--- a/csfunctions/events/__init__.py
+++ b/csfunctions/events/__init__.py
@@ -3,6 +3,14 @@
 from pydantic import Field
 
 from .bom_item_field_calculation import BOMItemFieldCalculationData, BOMItemFieldCalculationEvent
+from .change_order_release_check import ChangeOrderReleaseCheckData, ChangeOrderReleaseCheckEvent
+from .change_order_released import ChangeOrderReleasedData, ChangeOrderReleasedEvent
+from .change_order_status_change_check import ChangeOrderStatusChangeCheckData, ChangeOrderStatusChangeCheckEvent
+from .change_order_status_changed import ChangeOrderStatusChangedData, ChangeOrderStatusChangedEvent
+from .change_request_release_check import ChangeRequestReleaseCheckData, ChangeRequestReleaseCheckEvent
+from .change_request_released import ChangeRequestReleasedData, ChangeRequestReleasedEvent
+from .change_request_status_change_check import ChangeRequestStatusChangeCheckData, ChangeRequestStatusChangeCheckEvent
+from .change_request_status_changed import ChangeRequestStatusChangedData, ChangeRequestStatusChangedEvent
 from .custom_operations import (
     CustomOperationDocumentData,
     CustomOperationDocumentEvent,
@@ -45,6 +53,14 @@
     | EngineeringChangeReleaseCheckEvent
     | EngineeringChangeStatusChangedEvent
     | EngineeringChangeStatusChangeCheckEvent
+    | ChangeOrderReleasedEvent
+    | ChangeOrderReleaseCheckEvent
+    | ChangeOrderStatusChangedEvent
+    | ChangeOrderStatusChangeCheckEvent
+    | ChangeRequestReleasedEvent
+    | ChangeRequestReleaseCheckEvent
+    | ChangeRequestStatusChangedEvent
+    | ChangeRequestStatusChangeCheckEvent
     | WorkflowTaskTriggerEvent
     | DocumentCreateCheckEvent
     | DocumentModifyCheckEvent
@@ -68,6 +84,14 @@
     | EngineeringChangeReleaseCheckData
     | EngineeringChangeStatusChangedData
     | EngineeringChangeStatusChangeCheckData
+    | ChangeOrderReleasedData
+    | ChangeOrderReleaseCheckData
+    | ChangeOrderStatusChangedData
+    | ChangeOrderStatusChangeCheckData
+    | ChangeRequestReleasedData
+    | ChangeRequestReleaseCheckData
+    | ChangeRequestStatusChangedData
+    | ChangeRequestStatusChangeCheckData
     | WorkflowTaskTriggerEventData
     | DocumentCreateCheckData
     | DocumentModifyCheckData
@@ -89,6 +113,16 @@
     "DummyEvent",
     "EngineeringChangeReleasedEvent",
     "EngineeringChangeReleaseCheckEvent",
+    "EngineeringChangeStatusChangedEvent",
+    "EngineeringChangeStatusChangeCheckEvent",
+    "ChangeOrderReleasedEvent",
+    "ChangeOrderReleaseCheckEvent",
+    "ChangeOrderStatusChangedEvent",
+    "ChangeOrderStatusChangeCheckEvent",
+    "ChangeRequestReleasedEvent",
+    "ChangeRequestReleaseCheckEvent",
+    "ChangeRequestStatusChangedEvent",
+    "ChangeRequestStatusChangeCheckEvent",
     "WorkflowTaskTriggerEvent",
     "DocumentReleasedData",
     "DocumentReleaseCheckData",
@@ -102,6 +136,14 @@
     "EngineeringChangeReleaseCheckData",
     "EngineeringChangeStatusChangedData",
     "EngineeringChangeStatusChangeCheckData",
+    "ChangeOrderReleasedData",
+    "ChangeOrderReleaseCheckData",
+    "ChangeOrderStatusChangedData",
+    "ChangeOrderStatusChangeCheckData",
+    "ChangeRequestReleasedData",
+    "ChangeRequestReleaseCheckData",
+    "ChangeRequestStatusChangedData",
+    "ChangeRequestStatusChangeCheckData",
     "WorkflowTaskTriggerEventData",
     "DocumentReleasedDialogData",
     "PartReleasedDialogData",
diff --git a/csfunctions/events/base.py b/csfunctions/events/base.py
index 7d40a6e..2134469 100644
--- a/csfunctions/events/base.py
+++ b/csfunctions/events/base.py
@@ -22,6 +22,14 @@ class EventNames(str, Enum):
     PART_MODIFY_CHECK = "part_modify_check"
     ENGINEERING_CHANGE_STATUS_CHANGED = "engineering_change_status_changed"
     ENGINEERING_CHANGE_STATUS_CHANGE_CHECK = "engineering_change_status_change_check"
+    CHANGE_ORDER_RELEASED = "change_order_released"
+    CHANGE_ORDER_RELEASE_CHECK = "change_order_release_check"
+    CHANGE_ORDER_STATUS_CHANGED = "change_order_status_changed"
+    CHANGE_ORDER_STATUS_CHANGE_CHECK = "change_order_status_change_check"
+    CHANGE_REQUEST_RELEASED = "change_request_released"
+    CHANGE_REQUEST_RELEASE_CHECK = "change_request_release_check"
+    CHANGE_REQUEST_STATUS_CHANGED = "change_request_status_changed"
+    CHANGE_REQUEST_STATUS_CHANGE_CHECK = "change_request_status_change_check"
     CUSTOM_OPERATION_DOCUMENT = "custom_operation_document"
     CUSTOM_OPERATION_PART = "custom_operation_part"
 
diff --git a/csfunctions/events/change_order_release_check.py b/csfunctions/events/change_order_release_check.py
new file mode 100644
index 0000000..f5fce08
--- /dev/null
+++ b/csfunctions/events/change_order_release_check.py
@@ -0,0 +1,18 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeOrder, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeOrderReleaseCheckData(BaseModel):
+    documents: list[Document] = Field(..., description="List of included documents.")
+    parts: list[Part] = Field(..., description="List of included parts.")
+    change_orders: list[ChangeOrder] = Field(..., description="List of change orders that will be released.")
+
+
+class ChangeOrderReleaseCheckEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_ORDER_RELEASE_CHECK] = EventNames.CHANGE_ORDER_RELEASE_CHECK
+    data: ChangeOrderReleaseCheckData
diff --git a/csfunctions/events/change_order_released.py b/csfunctions/events/change_order_released.py
new file mode 100644
index 0000000..6c74b02
--- /dev/null
+++ b/csfunctions/events/change_order_released.py
@@ -0,0 +1,18 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeOrder, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeOrderReleasedData(BaseModel):
+    documents: list[Document] = Field(..., description="List of included documents.")
+    parts: list[Part] = Field(..., description="List of included parts.")
+    change_orders: list[ChangeOrder] = Field(..., description="List of change orders that were released.")
+
+
+class ChangeOrderReleasedEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_ORDER_RELEASED] = EventNames.CHANGE_ORDER_RELEASED
+    data: ChangeOrderReleasedData
diff --git a/csfunctions/events/change_order_status_change_check.py b/csfunctions/events/change_order_status_change_check.py
new file mode 100644
index 0000000..ea73770
--- /dev/null
+++ b/csfunctions/events/change_order_status_change_check.py
@@ -0,0 +1,19 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeOrder, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeOrderStatusChangeCheckData(BaseModel):
+    change_order: ChangeOrder = Field(..., description="The change order that will have its status modified")
+    target_status: int = Field(..., description="The target status of the change order")
+    documents: list[Document] = Field(..., description="List of documents attached to the change order")
+    parts: list[Part] = Field(..., description="List of parts attached to the change order")
+
+
+class ChangeOrderStatusChangeCheckEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_ORDER_STATUS_CHANGE_CHECK] = EventNames.CHANGE_ORDER_STATUS_CHANGE_CHECK
+    data: ChangeOrderStatusChangeCheckData
diff --git a/csfunctions/events/change_order_status_changed.py b/csfunctions/events/change_order_status_changed.py
new file mode 100644
index 0000000..375ceb0
--- /dev/null
+++ b/csfunctions/events/change_order_status_changed.py
@@ -0,0 +1,19 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeOrder, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeOrderStatusChangedData(BaseModel):
+    change_order: ChangeOrder = Field(..., description="The change order that had its status modified")
+    prev_status: int = Field(..., description="The previous status of the change order")
+    documents: list[Document] = Field(..., description="List of documents attached to the change order")
+    parts: list[Part] = Field(..., description="List of parts attached to the change order")
+
+
+class ChangeOrderStatusChangedEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_ORDER_STATUS_CHANGED] = EventNames.CHANGE_ORDER_STATUS_CHANGED
+    data: ChangeOrderStatusChangedData
diff --git a/csfunctions/events/change_request_release_check.py b/csfunctions/events/change_request_release_check.py
new file mode 100644
index 0000000..2051fbf
--- /dev/null
+++ b/csfunctions/events/change_request_release_check.py
@@ -0,0 +1,18 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeRequest, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeRequestReleaseCheckData(BaseModel):
+    documents: list[Document] = Field(..., description="List of included documents.")
+    parts: list[Part] = Field(..., description="List of included parts.")
+    change_requests: list[ChangeRequest] = Field(..., description="List of change requests that will be released.")
+
+
+class ChangeRequestReleaseCheckEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_REQUEST_RELEASE_CHECK] = EventNames.CHANGE_REQUEST_RELEASE_CHECK
+    data: ChangeRequestReleaseCheckData
diff --git a/csfunctions/events/change_request_released.py b/csfunctions/events/change_request_released.py
new file mode 100644
index 0000000..5662267
--- /dev/null
+++ b/csfunctions/events/change_request_released.py
@@ -0,0 +1,18 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeRequest, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeRequestReleasedData(BaseModel):
+    documents: list[Document] = Field(..., description="List of included documents.")
+    parts: list[Part] = Field(..., description="List of included parts.")
+    change_requests: list[ChangeRequest] = Field(..., description="List of change requests that were released.")
+
+
+class ChangeRequestReleasedEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_REQUEST_RELEASED] = EventNames.CHANGE_REQUEST_RELEASED
+    data: ChangeRequestReleasedData
diff --git a/csfunctions/events/change_request_status_change_check.py b/csfunctions/events/change_request_status_change_check.py
new file mode 100644
index 0000000..c45ff83
--- /dev/null
+++ b/csfunctions/events/change_request_status_change_check.py
@@ -0,0 +1,19 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeRequest, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeRequestStatusChangeCheckData(BaseModel):
+    change_request: ChangeRequest = Field(..., description="The change request that will have its status modified")
+    target_status: int = Field(..., description="The target status of the change request")
+    documents: list[Document] = Field(..., description="List of documents attached to the change request")
+    parts: list[Part] = Field(..., description="List of parts attached to the change request")
+
+
+class ChangeRequestStatusChangeCheckEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_REQUEST_STATUS_CHANGE_CHECK] = EventNames.CHANGE_REQUEST_STATUS_CHANGE_CHECK
+    data: ChangeRequestStatusChangeCheckData
diff --git a/csfunctions/events/change_request_status_changed.py b/csfunctions/events/change_request_status_changed.py
new file mode 100644
index 0000000..19e1c38
--- /dev/null
+++ b/csfunctions/events/change_request_status_changed.py
@@ -0,0 +1,19 @@
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+from csfunctions.objects import ChangeRequest, Document, Part
+
+from .base import BaseEvent, EventNames
+
+
+class ChangeRequestStatusChangedData(BaseModel):
+    change_request: ChangeRequest = Field(..., description="The change request that had its status modified")
+    prev_status: int = Field(..., description="The previous status of the change request")
+    documents: list[Document] = Field(..., description="List of documents attached to the change request")
+    parts: list[Part] = Field(..., description="List of parts attached to the change request")
+
+
+class ChangeRequestStatusChangedEvent(BaseEvent):
+    name: Literal[EventNames.CHANGE_REQUEST_STATUS_CHANGED] = EventNames.CHANGE_REQUEST_STATUS_CHANGED
+    data: ChangeRequestStatusChangedData
diff --git a/csfunctions/events/workflow_task_trigger.py b/csfunctions/events/workflow_task_trigger.py
index be66a2f..2bdf0c0 100644
--- a/csfunctions/events/workflow_task_trigger.py
+++ b/csfunctions/events/workflow_task_trigger.py
@@ -2,7 +2,7 @@
 
 from pydantic import BaseModel, Field
 
-from csfunctions.objects import Briefcase, Document, EngineeringChange, Part, Workflow
+from csfunctions.objects import Briefcase, ChangeOrder, ChangeRequest, Document, EngineeringChange, Part, Workflow
 
 from .base import BaseEvent, EventNames
 
@@ -14,6 +14,8 @@ class WorkflowTaskTriggerEventData(BaseModel):
     engineering_changes: list[EngineeringChange] = Field(
         [], description="List of engineering changes attached to the workflow."
     )
+    change_orders: list[ChangeOrder] = Field([], description="List of change orders attached to the workflow.")
+    change_requests: list[ChangeRequest] = Field([], description="List of change requests attached to the workflow.")
     briefcases: list[Briefcase] = Field([], description="List of briefcases attached to the workflow.")
 
 
diff --git a/csfunctions/objects/__init__.py b/csfunctions/objects/__init__.py
index d1222de..0538009 100644
--- a/csfunctions/objects/__init__.py
+++ b/csfunctions/objects/__init__.py
@@ -6,7 +6,7 @@
 from .briefcase import Briefcase
 from .classification import ObjectPropertyValue
 from .document import CADDocument, Document
-from .engineering_change import EngineeringChange
+from .engineering_change import Change, ChangeOrder, ChangeRequest, EngineeringChange
 from .file import File
 from .part import BOMItem, Material, Part
 from .person import Person
@@ -18,6 +18,8 @@
     | Part
     | File
     | EngineeringChange
+    | ChangeOrder
+    | ChangeRequest
     | Material
     | BOMItem
     | ObjectPropertyValue
@@ -34,6 +36,9 @@
     "Part",
     "File",
     "EngineeringChange",
+    "Change",
+    "ChangeOrder",
+    "ChangeRequest",
     "Material",
     "BOMItem",
     "ObjectPropertyValue",
diff --git a/csfunctions/objects/base.py b/csfunctions/objects/base.py
index ceb7eb1..df28f9f 100644
--- a/csfunctions/objects/base.py
+++ b/csfunctions/objects/base.py
@@ -14,6 +14,8 @@ class ObjectType(str, Enum):
     PART = "part"
     FILE = "file"
     ENGINEERING_CHANGE = "engineering_change"
+    CHANGE_ORDER = "change_order"
+    CHANGE_REQUEST = "change_request"
     MATERIAL = "material"
     BOM_ITEM = "bom_item"
     OBJECT_PROPERTY_VALUE = "object_property_value"
diff --git a/csfunctions/objects/briefcase.py b/csfunctions/objects/briefcase.py
index a9b4f83..cbdc634 100644
--- a/csfunctions/objects/briefcase.py
+++ b/csfunctions/objects/briefcase.py
@@ -4,7 +4,7 @@
 
 from .base import BaseObject, ObjectType
 from .document import Document
-from .engineering_change import EngineeringChange
+from .engineering_change import ChangeOrder, ChangeRequest, EngineeringChange
 from .part import Part
 
 if TYPE_CHECKING:
@@ -13,7 +13,8 @@
 
 class Briefcase(BaseObject):
     """
-    Briefcases are used by Workflows and can contain parts, documents or engineering changes.
+    Briefcases are used by Workflows and can contain parts, documents, engineering changes,
+    change orders or change requests.
     """
 
     object_type: Literal[ObjectType.BRIEFCASE] = ObjectType.BRIEFCASE
@@ -25,15 +26,23 @@ class Briefcase(BaseObject):
     engineering_change_ids: list[str] = Field(
         [], description="List of engineering change IDs in this Briefcase. (cdb_ec_id)"
     )
+    change_order_ids: list[str] = Field([], description="List of change order IDs in this Briefcase. (cs_change_id)")
+    change_request_ids: list[str] = Field(
+        [], description="List of change request IDs in this Briefcase. (cs_change_id)"
+    )
 
     parts: list[Part] = Field([], exclude=True)
     documents: list[Document] = Field([], exclude=True)
     engineering_changes: list[EngineeringChange] = Field([], exclude=True)
+    change_orders: list[ChangeOrder] = Field([], exclude=True)
+    change_requests: list[ChangeRequest] = Field([], exclude=True)
 
     def link_objects(self, data: "EventData"):
         parts = getattr(data, "parts", None)
         documents = getattr(data, "documents", None)
         engineering_changes = getattr(data, "engineering_changes", None)
+        change_orders = getattr(data, "change_orders", None)
+        change_requests = getattr(data, "change_requests", None)
 
         if parts and self.part_ids:
             self._link_parts(parts)
@@ -41,6 +50,10 @@ def link_objects(self, data: "EventData"):
             self._link_documents(documents)
         if engineering_changes and self.engineering_change_ids:
             self._link_engineering_changes(engineering_changes)
+        if change_orders and self.change_order_ids:
+            self._link_change_orders(change_orders)
+        if change_requests and self.change_request_ids:
+            self._link_change_requests(change_requests)
 
     def _link_parts(self, parts: list["Part"]):
         for part in parts:
@@ -59,3 +72,13 @@ def _link_engineering_changes(self, engineering_changes: list["EngineeringChange
                 and engineering_change not in self.engineering_changes
             ):
                 self.engineering_changes.append(engineering_change)
+
+    def _link_change_orders(self, change_orders: list["ChangeOrder"]):
+        for change_order in change_orders:
+            if change_order.cs_change_id in self.change_order_ids and change_order not in self.change_orders:
+                self.change_orders.append(change_order)
+
+    def _link_change_requests(self, change_requests: list["ChangeRequest"]):
+        for change_request in change_requests:
+            if change_request.cs_change_id in self.change_request_ids and change_request not in self.change_requests:
+                self.change_requests.append(change_request)
diff --git a/csfunctions/objects/engineering_change.py b/csfunctions/objects/engineering_change.py
index 7cdc855..b00d2f8 100644
--- a/csfunctions/objects/engineering_change.py
+++ b/csfunctions/objects/engineering_change.py
@@ -105,3 +105,108 @@ def _link_accompanying_documents(self, accompanying_documents: list["Document"])
                 and document not in self.accompanying_documents
             ):
                 self.accompanying_documents.append(document)
+
+
+class Change(BaseObject):
+    """
+    Base class for changes of the ECM module (change orders and change requests).
+    Use the concrete subclasses :class:`ChangeOrder` and :class:`ChangeRequest`.
+    """
+
+    cs_change_id: str = Field(..., description="Change ID")
+    cdb_project_id: str | None = Field("", description="Project ID")
+    product_object_oid: str | None = Field("", description="Product object ID")
+    end_time_plan: datetime | None = Field(None, description="Planned end time")
+    status: int = Field(..., description="Status")
+    title_de: str | None = Field("", description="Title (de)")
+    title_en: str | None = Field("", description="Title (en)")
+    cdb_object_id: str | None = Field(None, description="Object ID")
+    change_type: str | None = Field(None, description="Change Type")
+
+    cs_ecm_change_description_de: str | None = Field("", description="Description (de)")
+    cs_ecm_change_description_en: str | None = Field("", description="Description (en)")
+    c_event: str | None = Field("", description="Event")
+    change_reason_de: str | None = Field("", description="Reason (de)")
+    change_reason_en: str | None = Field("", description="Reason (en)")
+    c_source: str | None = Field("", description="Source")
+
+    part_ids: list[str] = Field([], description="List of part IDs, that were changed. (teilenummer@t_index)")
+    document_ids: list[str] = Field([], description="List of document IDs, that were changed. (z_nummer@z_index)")
+
+    affected_part_ids: list[str] = Field(
+        [], description="List of part IDs, that were planned to be changed. (teilenummer@t_index)"
+    )
+    affected_document_ids: list[str] = Field(
+        [], description="List of document IDs, that were planned to be changed. (z_nummer@z_index)"
+    )
+    accompanying_document_ids: list[str] = Field(
+        [], description="List of document IDs, that accompany the change. (z_nummer@z_index)"
+    )
+
+    parts: list[Part] = Field([], exclude=True)
+    documents: list[Document] = Field([], exclude=True)
+
+    affected_parts: list[Part] = Field([], exclude=True)
+    affected_documents: list[Document] = Field([], exclude=True)
+
+    accompanying_documents: list[Document] = Field([], exclude=True)
+
+    cdb_cpersno: str | None = Field("", description="Created by")
+    cdb_cdate: datetime | None = Field(None, description="Created on")
+    cdb_mpersno: str = Field("", description="Last Modified by")
+    cdb_mdate: datetime | None = Field(None, description="Last Modified on")
+
+    def link_objects(self, data: "EventData"):
+        parts = getattr(data, "parts", None)
+        documents = getattr(data, "documents", None)
+
+        if parts and self.part_ids:
+            self._link_parts(parts)
+        if parts and self.affected_part_ids:
+            self._link_affected_parts(parts)
+
+        if documents and self.document_ids:
+            self._link_documents(documents)
+        if documents and self.affected_document_ids:
+            self._link_affected_documents(documents)
+        if documents and self.accompanying_document_ids:
+            self._link_accompanying_documents(documents)
+
+    def _link_parts(self, parts: list["Part"]):
+        for part in parts:
+            if f"{part.teilenummer}@{part.t_index}" in self.part_ids and part not in self.parts:
+                self.parts.append(part)
+
+    def _link_documents(self, documents: list["Document"]):
+        for document in documents:
+            if f"{document.z_nummer}@{document.z_index}" in self.document_ids and document not in self.documents:
+                self.documents.append(document)
+
+    def _link_affected_parts(self, affected_parts: list["Part"]):
+        for part in affected_parts:
+            if f"{part.teilenummer}@{part.t_index}" in self.affected_part_ids and part not in self.affected_parts:
+                self.affected_parts.append(part)
+
+    def _link_affected_documents(self, affected_documents: list["Document"]):
+        for document in affected_documents:
+            if (
+                f"{document.z_nummer}@{document.z_index}" in self.affected_document_ids
+                and document not in self.affected_documents
+            ):
+                self.affected_documents.append(document)
+
+    def _link_accompanying_documents(self, accompanying_documents: list["Document"]):
+        for document in accompanying_documents:
+            if (
+                f"{document.z_nummer}@{document.z_index}" in self.accompanying_document_ids
+                and document not in self.accompanying_documents
+            ):
+                self.accompanying_documents.append(document)
+
+
+class ChangeOrder(Change):
+    object_type: Literal[ObjectType.CHANGE_ORDER] = ObjectType.CHANGE_ORDER
+
+
+class ChangeRequest(Change):
+    object_type: Literal[ObjectType.CHANGE_REQUEST] = ObjectType.CHANGE_REQUEST
diff --git a/docs/reference/events.md b/docs/reference/events.md
index 33856c1..5260134 100644
--- a/docs/reference/events.md
+++ b/docs/reference/events.md
@@ -154,6 +154,164 @@ This event is fired **after** an engineering change has been released. Raising a
 | documents           | list[[Document](objects.md#document)]                   | List of included documents.                     |
 | parts               | list[[Part](objects.md#part)]                           | List of included parts.                         |
 
+## ChangeOrderReleaseCheckEvent
+`csfunctions.events.ChangeOrderReleaseCheckEvent`
+
+This event is fired when a user tries to release a change order. Raising an exception will prevent the release.
+Be aware that the change order is not released yet and the release might still be aborted for other reasons, so don't sent the change order to e.g. an ERP system yet.
+
+**Supported actions:**
+
+- [AbortAndShowErrorAction](actions.md#abortandshowerroraction)
+
+**ChangeOrderReleaseCheckEvent.name:** change_order_release_check
+
+**ChangeOrderReleaseCheckEvent.data:**
+
+| Attribute     | Type                                        | Description                                  |
+| ------------- | ------------------------------------------- | -------------------------------------------- |
+| change_orders | list[[ChangeOrder](objects.md#changeorder)] | List of change orders that will be released. |
+| documents     | list[[Document](objects.md#document)]       | List of included documents.                  |
+| parts         | list[[Part](objects.md#part)]               | List of included parts.                      |
+
+
+## ChangeOrderReleasedEvent
+`csfunctions.events.ChangeOrderReleasedEvent`
+
+This event is fired **after** a change order has been released. Raising an exception thus can not prevent the release.
+
+**Supported actions:**
+
+- [StartWorkflowAction](actions.md#startworkflowaction)
+
+**ChangeOrderReleasedEvent.name:** change_order_released
+
+**ChangeOrderReleasedEvent.data:**
+
+| Attribute     | Type                                        | Description                               |
+| ------------- | ------------------------------------------- | ----------------------------------------- |
+| change_orders | list[[ChangeOrder](objects.md#changeorder)] | List of change orders that were released. |
+| documents     | list[[Document](objects.md#document)]       | List of included documents.               |
+| parts         | list[[Part](objects.md#part)]               | List of included parts.                   |
+
+
+## ChangeOrderStatusChangedEvent
+`csfunctions.events.ChangeOrderStatusChangedEvent`
+
+This event is fired **after** a change order's status has been modified. Raising an exception cannot prevent the status change.
+
+**ChangeOrderStatusChangedEvent.name:** change_order_status_changed
+
+**ChangeOrderStatusChangedEvent.data:**
+
+| Attribute    | Type                                  | Description                                       |
+| ------------ | ------------------------------------- | ------------------------------------------------- |
+| change_order | [ChangeOrder](objects.md#changeorder) | The change order that had its status modified     |
+| prev_status  | int                                   | The previous status of the change order           |
+| documents    | list[[Document](objects.md#document)] | List of documents attached to the change order    |
+| parts        | list[[Part](objects.md#part)]         | List of parts attached to the change order        |
+
+
+## ChangeOrderStatusChangeCheckEvent
+`csfunctions.events.ChangeOrderStatusChangeCheckEvent`
+
+This event is fired when a user tries to modify a change order's status. Raising an exception will prevent the status change.
+
+**Supported actions:**
+
+- [AbortAndShowErrorAction](actions.md#abortandshowerroraction)
+
+**ChangeOrderStatusChangeCheckEvent.name:** change_order_status_change_check
+
+**ChangeOrderStatusChangeCheckEvent.data:**
+
+| Attribute     | Type                                  | Description                                       |
+| ------------- | ------------------------------------- | ------------------------------------------------- |
+| change_order  | [ChangeOrder](objects.md#changeorder) | The change order that will have its status modified |
+| target_status | int                                   | The target status of the change order             |
+| documents     | list[[Document](objects.md#document)] | List of documents attached to the change order    |
+| parts         | list[[Part](objects.md#part)]         | List of parts attached to the change order        |
+
+
+## ChangeRequestReleaseCheckEvent
+`csfunctions.events.ChangeRequestReleaseCheckEvent`
+
+This event is fired when a user tries to release a change request. Raising an exception will prevent the release.
+Be aware that the change request is not released yet and the release might still be aborted for other reasons, so don't sent the change request to e.g. an ERP system yet.
+
+**Supported actions:**
+
+- [AbortAndShowErrorAction](actions.md#abortandshowerroraction)
+
+**ChangeRequestReleaseCheckEvent.name:** change_request_release_check
+
+**ChangeRequestReleaseCheckEvent.data:**
+
+| Attribute       | Type                                            | Description                                    |
+| --------------- | ----------------------------------------------- | ---------------------------------------------- |
+| change_requests | list[[ChangeRequest](objects.md#changerequest)] | List of change requests that will be released. |
+| documents       | list[[Document](objects.md#document)]           | List of included documents.                    |
+| parts           | list[[Part](objects.md#part)]                   | List of included parts.                        |
+
+
+## ChangeRequestReleasedEvent
+`csfunctions.events.ChangeRequestReleasedEvent`
+
+This event is fired **after** a change request has been released. Raising an exception thus can not prevent the release.
+
+**Supported actions:**
+
+- [StartWorkflowAction](actions.md#startworkflowaction)
+
+**ChangeRequestReleasedEvent.name:** change_request_released
+
+**ChangeRequestReleasedEvent.data:**
+
+| Attribute       | Type                                            | Description                                 |
+| --------------- | ----------------------------------------------- | ------------------------------------------- |
+| change_requests | list[[ChangeRequest](objects.md#changerequest)] | List of change requests that were released. |
+| documents       | list[[Document](objects.md#document)]           | List of included documents.                 |
+| parts           | list[[Part](objects.md#part)]                   | List of included parts.                     |
+
+
+## ChangeRequestStatusChangedEvent
+`csfunctions.events.ChangeRequestStatusChangedEvent`
+
+This event is fired **after** a change request's status has been modified. Raising an exception cannot prevent the status change.
+
+**ChangeRequestStatusChangedEvent.name:** change_request_status_changed
+
+**ChangeRequestStatusChangedEvent.data:**
+
+| Attribute      | Type                                      | Description                                      |
+| -------------- | ----------------------------------------- | ------------------------------------------------ |
+| change_request | [ChangeRequest](objects.md#changerequest) | The change request that had its status modified  |
+| prev_status    | int                                       | The previous status of the change request        |
+| documents      | list[[Document](objects.md#document)]     | List of documents attached to the change request |
+| parts          | list[[Part](objects.md#part)]             | List of parts attached to the change request     |
+
+
+## ChangeRequestStatusChangeCheckEvent
+`csfunctions.events.ChangeRequestStatusChangeCheckEvent`
+
+This event is fired when a user tries to modify a change request's status. Raising an exception will prevent the status change.
+
+**Supported actions:**
+
+- [AbortAndShowErrorAction](actions.md#abortandshowerroraction)
+
+**ChangeRequestStatusChangeCheckEvent.name:** change_request_status_change_check
+
+**ChangeRequestStatusChangeCheckEvent.data:**
+
+| Attribute      | Type                                      | Description                                          |
+| -------------- | ----------------------------------------- | ---------------------------------------------------- |
+| change_request | [ChangeRequest](objects.md#changerequest) | The change request that will have its status modified |
+| target_status  | int                                       | The target status of the change request              |
+| documents      | list[[Document](objects.md#document)]     | List of documents attached to the change request     |
+| parts          | list[[Part](objects.md#part)]             | List of parts attached to the change request         |
+
+
 ## PartCreateCheckEvent
 `csfunctions.events.PartCreateCheckEvent`
 
@@ -299,6 +457,8 @@ This event is fired by the workflow task "Trigger Webhook".
 | parts               | list[[Part](objects.md#part)]                           | List of parts attached to the workflow.               |
 | documents           | list[[Document](objects.md#document)]                   | List of documents attached to the workflow.           |
 | engineering_changes | list[[EngineeringChange](objects.md#engineeringchange)] | List of engineering changes attached to the workflow. |
+| change_orders       | list[[ChangeOrder](objects.md#changeorder)]             | List of change orders attached to the workflow.       |
+| change_requests     | list[[ChangeRequest](objects.md#changerequest)]         | List of change requests attached to the workflow.     |
 | briefcases          | list[[Briefcase](objects.md#briefcase)]                 | List of briefcases attached to the workflow.          |
 
 ## EngineeringChangeStatusChanged
diff --git a/docs/reference/objects.md b/docs/reference/objects.md
index 0e3176a..c80fa2a 100644
--- a/docs/reference/objects.md
+++ b/docs/reference/objects.md
@@ -143,7 +143,7 @@
 ## Briefcase
 `csfunctions.objects.Briefcase`
 
-Briefcases are used by Workflows and can contain parts, documents or engineering changes.
+Briefcases are used by Workflows and can contain parts, documents, engineering changes, change orders or change requests.
 
 |Attribute|Type|Description|
 |-|-|-|
@@ -152,9 +152,87 @@ Briefcases are used by Workflows and can contain parts, documents or engineering
 |part_ids|list[str]|List of part IDs in this Briefcase. (teilenummer@t_index)|
 |document_ids|list[str]|List of document IDs in this Briefcase. (z_nummer@z_index)|
 |engineering_change_ids|list[str]|List of engineering change IDs in this Briefcase. (cdb_ec_id)|
+|change_order_ids|list[str]|List of change order IDs in this Briefcase. (cs_change_id)|
+|change_request_ids|list[str]|List of change request IDs in this Briefcase. (cs_change_id)|
 |parts|list[[Part](objects.md#part)]||
 |documents|list[[Document](objects.md#document)]||
 |engineering_changes|list[[EngineeringChange](objects.md#engineeringchange)]||
+|change_orders|list[[ChangeOrder](objects.md#changeorder)]||
+|change_requests|list[[ChangeRequest](objects.md#changerequest)]||
+
+## ChangeOrder
+`csfunctions.objects.ChangeOrder`
+
+A change order of the ECM module. Shares all attributes of its base class `csfunctions.objects.Change`.
+
+|Attribute|Type|Description|
+|-|-|-|
+|cs_change_id|str|Change ID|
+|cdb_project_id|str \| None|Project ID|
+|product_object_oid|str \| None|Product object ID|
+|end_time_plan|datetime \| None|Planned end time|
+|status|int|Status|
+|title_de|str \| None|Title (de)|
+|title_en|str \| None|Title (en)|
+|cdb_object_id|str \| None|Object ID|
+|change_type|str \| None|Change Type|
+|cs_ecm_change_description_de|str \| None|Description (de)|
+|cs_ecm_change_description_en|str \| None|Description (en)|
+|c_event|str \| None|Event|
+|change_reason_de|str \| None|Reason (de)|
+|change_reason_en|str \| None|Reason (en)|
+|c_source|str \| None|Source|
+|part_ids|list[str]|List of part IDs, that were changed. (teilenummer@t_index)|
+|document_ids|list[str]|List of document IDs, that were changed. (z_nummer@z_index)|
+|affected_part_ids|list[str]|List of part IDs, that were planned to be changed. (teilenummer@t_index)|
+|affected_document_ids|list[str]|List of document IDs, that were planned to be changed. (z_nummer@z_index)|
+|accompanying_document_ids|list[str]|List of document IDs, that accompany the change. (z_nummer@z_index)|
+|parts|list[[Part](objects.md#part)]||
+|documents|list[[Document](objects.md#document)]||
+|affected_parts|list[[Part](objects.md#part)]||
+|affected_documents|list[[Document](objects.md#document)]||
+|accompanying_documents|list[[Document](objects.md#document)]||
+|cdb_cpersno|str \| None|Created by|
+|cdb_cdate|datetime \| None|Created on|
+|cdb_mpersno|str|Last Modified by|
+|cdb_mdate|datetime \| None|Last Modified on|
+
+## ChangeRequest
+`csfunctions.objects.ChangeRequest`
+
+A change request of the ECM module. Shares all attributes of its base class `csfunctions.objects.Change`.
+
+|Attribute|Type|Description|
+|-|-|-|
+|cs_change_id|str|Change ID|
+|cdb_project_id|str \| None|Project ID|
+|product_object_oid|str \| None|Product object ID|
+|end_time_plan|datetime \| None|Planned end time|
+|status|int|Status|
+|title_de|str \| None|Title (de)|
+|title_en|str \| None|Title (en)|
+|cdb_object_id|str \| None|Object ID|
+|change_type|str \| None|Change Type|
+|cs_ecm_change_description_de|str \| None|Description (de)|
+|cs_ecm_change_description_en|str \| None|Description (en)|
+|c_event|str \| None|Event|
+|change_reason_de|str \| None|Reason (de)|
+|change_reason_en|str \| None|Reason (en)|
+|c_source|str \| None|Source|
+|part_ids|list[str]|List of part IDs, that were changed. (teilenummer@t_index)|
+|document_ids|list[str]|List of document IDs, that were changed. (z_nummer@z_index)|
+|affected_part_ids|list[str]|List of part IDs, that were planned to be changed. (teilenummer@t_index)|
+|affected_document_ids|list[str]|List of document IDs, that were planned to be changed. (z_nummer@z_index)|
+|accompanying_document_ids|list[str]|List of document IDs, that accompany the change. (z_nummer@z_index)|
+|parts|list[[Part](objects.md#part)]||
+|documents|list[[Document](objects.md#document)]||
+|affected_parts|list[[Part](objects.md#part)]||
+|affected_documents|list[[Document](objects.md#document)]||
+|accompanying_documents|list[[Document](objects.md#document)]||
+|cdb_cpersno|str \| None|Created by|
+|cdb_cdate|datetime \| None|Created on|
+|cdb_mpersno|str|Last Modified by|
+|cdb_mdate|datetime \| None|Last Modified on|
 
 ## Document
 `csfunctions.objects.Document`
diff --git a/json_schemas/request.json b/json_schemas/request.json
index d121c07..82e97ff 100644
--- a/json_schemas/request.json
+++ b/json_schemas/request.json
@@ -1838,7 +1838,7 @@
       "type": "object"
     },
     "Briefcase": {
-      "description": "Briefcases are used by Workflows and can contain parts, documents or engineering changes.",
+      "description": "Briefcases are used by Workflows and can contain parts, documents, engineering changes,\nchange orders or change requests.",
       "properties": {
         "object_type": {
           "const": "briefcase",
@@ -1891,35 +1891,1205 @@
           "title": "Engineering Change Ids",
           "type": "array"
         },
+        "change_order_ids": {
+          "default": [],
+          "description": "List of change order IDs in this Briefcase. (cs_change_id)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Change Order Ids",
+          "type": "array"
+        },
+        "change_request_ids": {
+          "default": [],
+          "description": "List of change request IDs in this Briefcase. (cs_change_id)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Change Request Ids",
+          "type": "array"
+        },
+        "parts": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        },
+        "documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "engineering_changes": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/EngineeringChange"
+          },
+          "title": "Engineering Changes",
+          "type": "array"
+        },
+        "change_orders": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/ChangeOrder"
+          },
+          "title": "Change Orders",
+          "type": "array"
+        },
+        "change_requests": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/ChangeRequest"
+          },
+          "title": "Change Requests",
+          "type": "array"
+        }
+      },
+      "required": [
+        "cdb_object_id"
+      ],
+      "title": "Briefcase",
+      "type": "object"
+    },
+    "ChangeOrder": {
+      "properties": {
+        "object_type": {
+          "const": "change_order",
+          "default": "change_order",
+          "title": "Object Type",
+          "type": "string"
+        },
+        "cs_change_id": {
+          "description": "Change ID",
+          "title": "Cs Change Id",
+          "type": "string"
+        },
+        "cdb_project_id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Project ID",
+          "title": "Cdb Project Id"
+        },
+        "product_object_oid": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Product object ID",
+          "title": "Product Object Oid"
+        },
+        "end_time_plan": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Planned end time",
+          "title": "End Time Plan"
+        },
+        "status": {
+          "description": "Status",
+          "title": "Status",
+          "type": "integer"
+        },
+        "title_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Title (de)",
+          "title": "Title De"
+        },
+        "title_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Title (en)",
+          "title": "Title En"
+        },
+        "cdb_object_id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Object ID",
+          "title": "Cdb Object Id"
+        },
+        "change_type": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Change Type",
+          "title": "Change Type"
+        },
+        "cs_ecm_change_description_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Description (de)",
+          "title": "Cs Ecm Change Description De"
+        },
+        "cs_ecm_change_description_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Description (en)",
+          "title": "Cs Ecm Change Description En"
+        },
+        "c_event": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Event",
+          "title": "C Event"
+        },
+        "change_reason_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Reason (de)",
+          "title": "Change Reason De"
+        },
+        "change_reason_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Reason (en)",
+          "title": "Change Reason En"
+        },
+        "c_source": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Source",
+          "title": "C Source"
+        },
+        "part_ids": {
+          "default": [],
+          "description": "List of part IDs, that were changed. (teilenummer@t_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Part Ids",
+          "type": "array"
+        },
+        "document_ids": {
+          "default": [],
+          "description": "List of document IDs, that were changed. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Document Ids",
+          "type": "array"
+        },
+        "affected_part_ids": {
+          "default": [],
+          "description": "List of part IDs, that were planned to be changed. (teilenummer@t_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Affected Part Ids",
+          "type": "array"
+        },
+        "affected_document_ids": {
+          "default": [],
+          "description": "List of document IDs, that were planned to be changed. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Affected Document Ids",
+          "type": "array"
+        },
+        "accompanying_document_ids": {
+          "default": [],
+          "description": "List of document IDs, that accompany the change. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Accompanying Document Ids",
+          "type": "array"
+        },
+        "parts": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        },
+        "documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "affected_parts": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Affected Parts",
+          "type": "array"
+        },
+        "affected_documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Affected Documents",
+          "type": "array"
+        },
+        "accompanying_documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Accompanying Documents",
+          "type": "array"
+        },
+        "cdb_cpersno": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Created by",
+          "title": "Cdb Cpersno"
+        },
+        "cdb_cdate": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Created on",
+          "title": "Cdb Cdate"
+        },
+        "cdb_mpersno": {
+          "default": "",
+          "description": "Last Modified by",
+          "title": "Cdb Mpersno",
+          "type": "string"
+        },
+        "cdb_mdate": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Last Modified on",
+          "title": "Cdb Mdate"
+        }
+      },
+      "required": [
+        "cs_change_id",
+        "status"
+      ],
+      "title": "ChangeOrder",
+      "type": "object"
+    },
+    "ChangeOrderReleaseCheckData": {
+      "properties": {
+        "documents": {
+          "description": "List of included documents.",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of included parts.",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        },
+        "change_orders": {
+          "description": "List of change orders that will be released.",
+          "items": {
+            "$ref": "#/$defs/ChangeOrder"
+          },
+          "title": "Change Orders",
+          "type": "array"
+        }
+      },
+      "required": [
+        "documents",
+        "parts",
+        "change_orders"
+      ],
+      "title": "ChangeOrderReleaseCheckData",
+      "type": "object"
+    },
+    "ChangeOrderReleaseCheckEvent": {
+      "properties": {
+        "name": {
+          "const": "change_order_release_check",
+          "default": "change_order_release_check",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeOrderReleaseCheckData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeOrderReleaseCheckEvent",
+      "type": "object"
+    },
+    "ChangeOrderReleasedData": {
+      "properties": {
+        "documents": {
+          "description": "List of included documents.",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of included parts.",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        },
+        "change_orders": {
+          "description": "List of change orders that were released.",
+          "items": {
+            "$ref": "#/$defs/ChangeOrder"
+          },
+          "title": "Change Orders",
+          "type": "array"
+        }
+      },
+      "required": [
+        "documents",
+        "parts",
+        "change_orders"
+      ],
+      "title": "ChangeOrderReleasedData",
+      "type": "object"
+    },
+    "ChangeOrderReleasedEvent": {
+      "properties": {
+        "name": {
+          "const": "change_order_released",
+          "default": "change_order_released",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeOrderReleasedData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeOrderReleasedEvent",
+      "type": "object"
+    },
+    "ChangeOrderStatusChangeCheckData": {
+      "properties": {
+        "change_order": {
+          "$ref": "#/$defs/ChangeOrder",
+          "description": "The change order that will have its status modified"
+        },
+        "target_status": {
+          "description": "The target status of the change order",
+          "title": "Target Status",
+          "type": "integer"
+        },
+        "documents": {
+          "description": "List of documents attached to the change order",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of parts attached to the change order",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        }
+      },
+      "required": [
+        "change_order",
+        "target_status",
+        "documents",
+        "parts"
+      ],
+      "title": "ChangeOrderStatusChangeCheckData",
+      "type": "object"
+    },
+    "ChangeOrderStatusChangeCheckEvent": {
+      "properties": {
+        "name": {
+          "const": "change_order_status_change_check",
+          "default": "change_order_status_change_check",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeOrderStatusChangeCheckData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeOrderStatusChangeCheckEvent",
+      "type": "object"
+    },
+    "ChangeOrderStatusChangedData": {
+      "properties": {
+        "change_order": {
+          "$ref": "#/$defs/ChangeOrder",
+          "description": "The change order that had its status modified"
+        },
+        "prev_status": {
+          "description": "The previous status of the change order",
+          "title": "Prev Status",
+          "type": "integer"
+        },
+        "documents": {
+          "description": "List of documents attached to the change order",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of parts attached to the change order",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        }
+      },
+      "required": [
+        "change_order",
+        "prev_status",
+        "documents",
+        "parts"
+      ],
+      "title": "ChangeOrderStatusChangedData",
+      "type": "object"
+    },
+    "ChangeOrderStatusChangedEvent": {
+      "properties": {
+        "name": {
+          "const": "change_order_status_changed",
+          "default": "change_order_status_changed",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeOrderStatusChangedData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeOrderStatusChangedEvent",
+      "type": "object"
+    },
+    "ChangeRequest": {
+      "properties": {
+        "object_type": {
+          "const": "change_request",
+          "default": "change_request",
+          "title": "Object Type",
+          "type": "string"
+        },
+        "cs_change_id": {
+          "description": "Change ID",
+          "title": "Cs Change Id",
+          "type": "string"
+        },
+        "cdb_project_id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Project ID",
+          "title": "Cdb Project Id"
+        },
+        "product_object_oid": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Product object ID",
+          "title": "Product Object Oid"
+        },
+        "end_time_plan": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Planned end time",
+          "title": "End Time Plan"
+        },
+        "status": {
+          "description": "Status",
+          "title": "Status",
+          "type": "integer"
+        },
+        "title_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Title (de)",
+          "title": "Title De"
+        },
+        "title_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Title (en)",
+          "title": "Title En"
+        },
+        "cdb_object_id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Object ID",
+          "title": "Cdb Object Id"
+        },
+        "change_type": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Change Type",
+          "title": "Change Type"
+        },
+        "cs_ecm_change_description_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Description (de)",
+          "title": "Cs Ecm Change Description De"
+        },
+        "cs_ecm_change_description_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Description (en)",
+          "title": "Cs Ecm Change Description En"
+        },
+        "c_event": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Event",
+          "title": "C Event"
+        },
+        "change_reason_de": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Reason (de)",
+          "title": "Change Reason De"
+        },
+        "change_reason_en": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Reason (en)",
+          "title": "Change Reason En"
+        },
+        "c_source": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Source",
+          "title": "C Source"
+        },
+        "part_ids": {
+          "default": [],
+          "description": "List of part IDs, that were changed. (teilenummer@t_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Part Ids",
+          "type": "array"
+        },
+        "document_ids": {
+          "default": [],
+          "description": "List of document IDs, that were changed. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Document Ids",
+          "type": "array"
+        },
+        "affected_part_ids": {
+          "default": [],
+          "description": "List of part IDs, that were planned to be changed. (teilenummer@t_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Affected Part Ids",
+          "type": "array"
+        },
+        "affected_document_ids": {
+          "default": [],
+          "description": "List of document IDs, that were planned to be changed. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Affected Document Ids",
+          "type": "array"
+        },
+        "accompanying_document_ids": {
+          "default": [],
+          "description": "List of document IDs, that accompany the change. (z_nummer@z_index)",
+          "items": {
+            "type": "string"
+          },
+          "title": "Accompanying Document Ids",
+          "type": "array"
+        },
+        "parts": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        },
+        "documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "affected_parts": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Affected Parts",
+          "type": "array"
+        },
+        "affected_documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Affected Documents",
+          "type": "array"
+        },
+        "accompanying_documents": {
+          "default": [],
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Accompanying Documents",
+          "type": "array"
+        },
+        "cdb_cpersno": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": "",
+          "description": "Created by",
+          "title": "Cdb Cpersno"
+        },
+        "cdb_cdate": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Created on",
+          "title": "Cdb Cdate"
+        },
+        "cdb_mpersno": {
+          "default": "",
+          "description": "Last Modified by",
+          "title": "Cdb Mpersno",
+          "type": "string"
+        },
+        "cdb_mdate": {
+          "anyOf": [
+            {
+              "format": "date-time",
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "description": "Last Modified on",
+          "title": "Cdb Mdate"
+        }
+      },
+      "required": [
+        "cs_change_id",
+        "status"
+      ],
+      "title": "ChangeRequest",
+      "type": "object"
+    },
+    "ChangeRequestReleaseCheckData": {
+      "properties": {
+        "documents": {
+          "description": "List of included documents.",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
         "parts": {
-          "default": [],
+          "description": "List of included parts.",
           "items": {
             "$ref": "#/$defs/Part"
           },
           "title": "Parts",
           "type": "array"
         },
+        "change_requests": {
+          "description": "List of change requests that will be released.",
+          "items": {
+            "$ref": "#/$defs/ChangeRequest"
+          },
+          "title": "Change Requests",
+          "type": "array"
+        }
+      },
+      "required": [
+        "documents",
+        "parts",
+        "change_requests"
+      ],
+      "title": "ChangeRequestReleaseCheckData",
+      "type": "object"
+    },
+    "ChangeRequestReleaseCheckEvent": {
+      "properties": {
+        "name": {
+          "const": "change_request_release_check",
+          "default": "change_request_release_check",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeRequestReleaseCheckData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeRequestReleaseCheckEvent",
+      "type": "object"
+    },
+    "ChangeRequestReleasedData": {
+      "properties": {
         "documents": {
-          "default": [],
+          "description": "List of included documents.",
           "items": {
             "$ref": "#/$defs/Document"
           },
           "title": "Documents",
           "type": "array"
         },
-        "engineering_changes": {
-          "default": [],
+        "parts": {
+          "description": "List of included parts.",
           "items": {
-            "$ref": "#/$defs/EngineeringChange"
+            "$ref": "#/$defs/Part"
           },
-          "title": "Engineering Changes",
+          "title": "Parts",
+          "type": "array"
+        },
+        "change_requests": {
+          "description": "List of change requests that were released.",
+          "items": {
+            "$ref": "#/$defs/ChangeRequest"
+          },
+          "title": "Change Requests",
           "type": "array"
         }
       },
       "required": [
-        "cdb_object_id"
+        "documents",
+        "parts",
+        "change_requests"
       ],
-      "title": "Briefcase",
+      "title": "ChangeRequestReleasedData",
+      "type": "object"
+    },
+    "ChangeRequestReleasedEvent": {
+      "properties": {
+        "name": {
+          "const": "change_request_released",
+          "default": "change_request_released",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeRequestReleasedData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeRequestReleasedEvent",
+      "type": "object"
+    },
+    "ChangeRequestStatusChangeCheckData": {
+      "properties": {
+        "change_request": {
+          "$ref": "#/$defs/ChangeRequest",
+          "description": "The change request that will have its status modified"
+        },
+        "target_status": {
+          "description": "The target status of the change request",
+          "title": "Target Status",
+          "type": "integer"
+        },
+        "documents": {
+          "description": "List of documents attached to the change request",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of parts attached to the change request",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        }
+      },
+      "required": [
+        "change_request",
+        "target_status",
+        "documents",
+        "parts"
+      ],
+      "title": "ChangeRequestStatusChangeCheckData",
+      "type": "object"
+    },
+    "ChangeRequestStatusChangeCheckEvent": {
+      "properties": {
+        "name": {
+          "const": "change_request_status_change_check",
+          "default": "change_request_status_change_check",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeRequestStatusChangeCheckData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeRequestStatusChangeCheckEvent",
+      "type": "object"
+    },
+    "ChangeRequestStatusChangedData": {
+      "properties": {
+        "change_request": {
+          "$ref": "#/$defs/ChangeRequest",
+          "description": "The change request that had its status modified"
+        },
+        "prev_status": {
+          "description": "The previous status of the change request",
+          "title": "Prev Status",
+          "type": "integer"
+        },
+        "documents": {
+          "description": "List of documents attached to the change request",
+          "items": {
+            "$ref": "#/$defs/Document"
+          },
+          "title": "Documents",
+          "type": "array"
+        },
+        "parts": {
+          "description": "List of parts attached to the change request",
+          "items": {
+            "$ref": "#/$defs/Part"
+          },
+          "title": "Parts",
+          "type": "array"
+        }
+      },
+      "required": [
+        "change_request",
+        "prev_status",
+        "documents",
+        "parts"
+      ],
+      "title": "ChangeRequestStatusChangedData",
+      "type": "object"
+    },
+    "ChangeRequestStatusChangedEvent": {
+      "properties": {
+        "name": {
+          "const": "change_request_status_changed",
+          "default": "change_request_status_changed",
+          "title": "Name",
+          "type": "string"
+        },
+        "event_id": {
+          "description": "unique identifier",
+          "title": "Event Id",
+          "type": "string"
+        },
+        "data": {
+          "$ref": "#/$defs/ChangeRequestStatusChangedData"
+        }
+      },
+      "required": [
+        "event_id",
+        "data"
+      ],
+      "title": "ChangeRequestStatusChangedEvent",
       "type": "object"
     },
     "CustomOperationDocumentData": {
@@ -9897,6 +11067,24 @@
           "title": "Engineering Changes",
           "type": "array"
         },
+        "change_orders": {
+          "default": [],
+          "description": "List of change orders attached to the workflow.",
+          "items": {
+            "$ref": "#/$defs/ChangeOrder"
+          },
+          "title": "Change Orders",
+          "type": "array"
+        },
+        "change_requests": {
+          "default": [],
+          "description": "List of change requests attached to the workflow.",
+          "items": {
+            "$ref": "#/$defs/ChangeRequest"
+          },
+          "title": "Change Requests",
+          "type": "array"
+        },
         "briefcases": {
           "default": [],
           "description": "List of briefcases attached to the workflow.",
@@ -9923,6 +11111,14 @@
       "discriminator": {
         "mapping": {
           "bom_item_field_calculation": "#/$defs/BOMItemFieldCalculationEvent",
+          "change_order_release_check": "#/$defs/ChangeOrderReleaseCheckEvent",
+          "change_order_released": "#/$defs/ChangeOrderReleasedEvent",
+          "change_order_status_change_check": "#/$defs/ChangeOrderStatusChangeCheckEvent",
+          "change_order_status_changed": "#/$defs/ChangeOrderStatusChangedEvent",
+          "change_request_release_check": "#/$defs/ChangeRequestReleaseCheckEvent",
+          "change_request_released": "#/$defs/ChangeRequestReleasedEvent",
+          "change_request_status_change_check": "#/$defs/ChangeRequestStatusChangeCheckEvent",
+          "change_request_status_changed": "#/$defs/ChangeRequestStatusChangedEvent",
           "custom_operation_document": "#/$defs/CustomOperationDocumentEvent",
           "custom_operation_part": "#/$defs/CustomOperationPartEvent",
           "document_create_check": "#/$defs/DocumentCreateCheckEvent",
@@ -9985,6 +11181,30 @@
         {
           "$ref": "#/$defs/EngineeringChangeStatusChangeCheckEvent"
         },
+        {
+          "$ref": "#/$defs/ChangeOrderReleasedEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeOrderReleaseCheckEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeOrderStatusChangedEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeOrderStatusChangeCheckEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeRequestReleasedEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeRequestReleaseCheckEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeRequestStatusChangedEvent"
+        },
+        {
+          "$ref": "#/$defs/ChangeRequestStatusChangeCheckEvent"
+        },
         {
           "$ref": "#/$defs/WorkflowTaskTriggerEvent"
         },