> For the complete documentation index, see [llms.txt](https://autodesk.ifc-manual.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://autodesk.ifc-manual.com/revit/ifc-export-settings-dialog/property-sets/base-quantities.md).

# Base Quantities

**Export base quantities** will include another type of property sets defined in the IFC schema as well, which are meant specifically for estimation and QTO purposes.

For a wall these quantities typically look like this:<br>

<figure><img src="https://2715261634-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FprbMwk21uTZaZrhwExiJ%2Fuploads%2FCccbNpUDMWarEgjrAVJr%2Fimage.png?alt=media&amp;token=55112712-6547-4293-bf77-e2965911227a" alt=""><figcaption></figcaption></figure>

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