Revit与Forge文档间通用唯一标识（Unique Id）替代方案咨询

Great question — I’ve run into the exact same issue with Revit Project Information Unique IDs being duplicated across independent files, usually when projects are created from the same template or copied directly. That identifier is tied to the project information element itself, which gets carried over when you duplicate a project or use a template, so it’s not reliable for cross-file uniqueness.

Here are the most reliable alternatives that work seamlessly between Revit and Forge:

• Revit File GUID
  Every Revit file gets a unique, immutable GUID generated at creation time (even if you copy the file, the new copy will have a fresh GUID). In Revit’s API, you can fetch this via Document.GetGUID(). On the Forge side, this value maps to the externalId of the root node in the model’s metadata (retrieved via the Model Derivative API). This is the simplest, out-of-the-box solution since it’s guaranteed unique per file.

• Forge Document URN + Version ID
  Each document uploaded to Forge gets a unique urn, and every new version of that document gets its own version ID. If you map your Revit files directly to their corresponding Forge URNs (and track versions), this creates a rock-solid link. Even if two Revit files accidentally have overlapping identifiers, their Forge URNs will always be distinct.

• Custom Unique Parameter
  For full control, add a custom project-level parameter to your Revit projects (e.g., Forge_Unique_Project_ID). Generate a new GUID for this parameter when a project is created (either manually or via a Revit add-in), then ensure this value is included in the Forge metadata during translation. This lets you completely avoid any built-in Revit identifier quirks.

• Combined Composite Identifier
  If you want to hedge your bets, combine multiple attributes like the Project Information Unique ID, Revit File GUID, and project creation date. While this is more complex, it eliminates the risk of any single identifier collision. Just make sure you can retrieve all these values from both Revit and Forge.

To recap: The Project Information Unique ID isn’t safe for cross-file uniqueness because it’s inherited from templates or copied projects. The Revit File GUID or Forge URN are your best bets for a simple, reliable solution.

内容的提问来源于stack exchange，提问作者user16918900