# Collaboration — Altium 365 API
> Comments, comment threads, mentions, annotations and tasks.

Concepts: [collaboration](https://altiumdeveloper.github.io/cdm/subsets/collaboration/). Schema slice: [schema.graphql](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/schema.graphql) (~4454 tokens). Overview: [overview](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/overview.md).

## Entities
- [DesComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/types/objects/des-comment.md): Comment — A single entry in a comment thread: either the initial comment, pinned to a point, an object or an area of a design document (or to a BOM line), or a reply to it. Via: DesCommentThread.comments, DesTask.comments
- [DesCommentThread](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/types/objects/des-comment-thread.md): Comment Thread — Comment Thread represents a structured discussion linked to a specific design object, document, or workspace item, capturing feedback, decisions, and context directly within the collaborative design… GRID `grid:workspace:{workspace-id}:collaboration:comment-thread/{id}`. Via: desCommentThread, desCommentThreads, DesDesignItem.commentThreads, DesPcb.commentThreads, DesSchematic.commentThreads
- [DesTask](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/types/objects/des-task.md): Task — Task represents a discrete unit of work assigned to a user or team within the design workflow, used to track progress, responsibility, and completion status for design, review, or management activiti… GRID `grid:workspace:{workspace-id}:collaboration:task/{id}`. Via: desProjectTasks, desWorkspaceTasks, DesProject.tasks, DesWorkspace.tasks

## Entry points
- [desCommentThreads](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/queries/des-comment-threads.md) (list): Search for comment threads associated with a project.
- [desProjectTasks](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/queries/des-project-tasks.md) (list): The list of project tasks.
- [desWorkspaceTasks](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/queries/des-workspace-tasks.md) (list): The list of workspace tasks.

## Queries
- [desAnnotations](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/queries/des-annotations.md): Search annotations within a project with results in paged groups.
- [desCommentThread](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/queries/des-comment-thread.md): Search for a specific comment thread associated with a project.

## Mutations
- [desCreateComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-create-comment.md): Creates a new comment.
- [desCreateCommentThread](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-create-comment-thread.md): Creates a new comment thread.
- [desCreateProjectTask](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-create-project-task.md): Creates a project task.
- [desCreateTaskComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-create-task-comment.md): Creates a new comment for the specified task.
- [desCreateWorkspaceTask](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-create-workspace-task.md): Creates a workspace task.
- [desDeleteComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-delete-comment.md): Permanently deletes the specified comment.
- [desDeleteCommentThread](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-delete-comment-thread.md): Permanently deletes a comment thread.
- [desDeleteTask](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-delete-task.md): Deletes the task specified by its node identifier.
- [desDeleteTaskComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-delete-task-comment.md): Deletes the specified task comment.
- [desUpdateComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-update-comment.md): Updates the specified comment.
- [desUpdateCommentThread](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-update-comment-thread.md): Updates an existing comment thread.
- [desUpdateTask](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-update-task.md): Updates the specified task.
- [desUpdateTaskComment](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/mutations/des-update-task-comment.md): Updates the specified task comment.

## Subscriptions
- [desOnCommentUpdated](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/operations/subscriptions/des-on-comment-updated.md): Called on subscription events.

## Optional
- [All types in Collaboration](https://altiumdeveloper.github.io/platform-api-docs/reference/collaboration/types.txt): one line per type (~2239 tokens)