Using InDesign Server (or scripts in InDesign Desktop) via JavaScript, it would be very helpful if there was an API/mechanism for discovering details for table of contents usage.

Current Issue:
It doesn't look like there is a way to see if a TOCStyle is actually used anywhere. A document can contain multiple TOCStyles, but it's possible only one is placed in the document. Likewise, it doesn't appear there is a way to resolve the TOCStyle being used for a Story that is of type StoryTypes.TOC_STORY.

Proposed solution(s):
- Add a Stories property to the TOCStyle object that contains references to the Story objects that have that TOCStyle applied.
- Expose the Story 'AppliedTOCStyle' property via ExtendScipt. This property already exists on the Story IDML object but doesn't appear to be exposed through ExtendScript.

Thanks for your time!