Update ACC Custom Attributes

Updates one or more custom attribute values on a document in Autodesk Construction Cloud and returns the full set of custom attributes for that document.

Purpose

Use this task when a workflow needs to write metadata back to an ACC document, such as stamping a review status, recording a revision number, or capturing a date. The file can be identified by its path within the project or by its URN, giving flexibility for workflows that already hold a URN from an earlier step. The task returns all custom attributes on the document, not just the ones that were updated, making the output useful for verification or downstream logic.

Inputs

Field	Type	Required	Description
Hub Name	Text	Yes	The friendly name of the ACC Hub/Account as shown in the ACC web app.
Project Name	Text	Yes	Name of the ACC project containing the target file.
File Identifier	Text	Yes	Identifies the target file. Accepts a file path within the project (e.g. Project Files/Designs/MyModel.rvt), a lineage URN, or a version URN.
Custom Attributes	Key-Value Pairs	No	Dictionary of custom attribute names and the values to set. Each key must match the name of an attribute definition that already exists in the project.

Outputs

Name	Description
DocumentName	The display name of the file that was updated.
CustomAttributes	A dictionary of all custom attribute names and their current values on the document after the update.
CustomAttributesList	The full list of custom attribute result objects as returned by ACC, including type information.
UpdatedCount	The number of attributes that were written in this operation.