revisionId property

The revision ID of the document.

Can be used in update requests to specify which revision of a document to apply updates to and how the request should behave if the document has been edited since that revision. Only populated if the user has edit access to the document. The revision ID is not a sequential number but an opaque string. The format of the revision ID might change over time. A returned revision ID is only guaranteed to be valid for 24 hours after it has been returned and cannot be shared across users. If the revision ID is unchanged between calls, then the document has not changed. Conversely, a changed ID (for the same document and user) usually means the document has been updated. However, a changed ID can also be due to internal factors such as ID format changes.

Output only.