topic Re: Categories ID in Revit API Forum

Categories ID

bimmatch — Wed, 22 Jun 2022 12:26:15 GMT

Hi dear all,

I'm looking for a list of Revit categories with IDs, can someone direct me to the right source?

I found this source, but I'm afraid it's not updated: http://bimology.blogspot.com/2010/01/revit-categories.html

And following this context: Do Revit and Forge use the same category IDs?

Re: Categories ID

ridaabderrahmane — Wed, 22 Jun 2022 15:52:22 GMT

Hi there,

you can use the BuiltInCategory enumeration instead of hard coding the category Id.

for example wallsCategoryId = (int)BuiltInCategory.OST_Walls

you can find the BuiltInCategory documentations from the Revit api official documentation : https://www.revitapidocs.com/2019/ba1c5b30-242f-5fdc-8ea9-ec3b61e6e722.htm

Best regards,

Re: Categories ID

Yien_Chao — Wed, 22 Jun 2022 16:38:47 GMT

well you can get the builintcategory here : https://www.revitapidocs.com/2022/c3334f01-3294-3214-8dbf-d4bb79bb54b1.htm

then use .Id to get the Id.

but what is the goal exactly?

Re: Categories ID

bimmatch — Wed, 22 Jun 2022 16:43:29 GMT

Thanks for the reply!
I was looking more for documentation of such a list with the ID attached for each category and a parent-child structure of it, rather than scrap it with a code. I need it more for research and mapping rather than runtime fetching.
Any clue where we have it documented?

Re: Categories ID

ridaabderrahmane — Wed, 22 Jun 2022 16:47:43 GMT

Hi,

you can check this spreadsheet, it contains what you need:

https://docs.google.com/spreadsheets/d/1uNa77XYLjeN-1c63gsX6C5D5Pvn_3ZB4B0QMgPeloTw/edit#gid=321091865

Best regards,

Re: Categories ID

Yien_Chao — Wed, 22 Jun 2022 16:50:07 GMT

your best bet is the RevitAPI link i've posted

but if you dont want to code then check the addin by Jeremy Tammik (RevitLookup) : https://github.com/jeremytammik/RevitLookup

Re: Categories ID

bimmatch — Wed, 22 Jun 2022 17:39:33 GMT

Thanks

Re: Categories ID

bimmatch — Wed, 22 Jun 2022 18:00:40 GMT

Thanks a million.
A question: does Forge works with the same IDs?

Re: Categories ID

jeremy_tammik — Thu, 23 Jun 2022 17:09:26 GMT

You can create your own lists of Revit built-in and RVT document categories using The Building Coder samples command CmdCategories:

https://github.com/jeremytammik/the_building_coder_samples/blob/master/BuildingCoder/CmdCategories.cs

The Forge categories are completely different. Or, to put it stronger still, I do not believe such a thing exists. Forge is domain agnostic and supports CAD models from all domains, e.g., architecture, mechanical engineering, etc., and from a large variety of CAD seed files, cf.

https://forge.autodesk.com/en/docs/model-derivative/v2/developers_guide/supported-translations/

Revit categories may propagate through to Forge somehow with the BIM, but I doubt you will find any such concept in an Inventor, AutoCAD or 3D Studio file.