# \#common-schema

**URL:** https://forums.buildingsmart.org/tag/common-schema/20.md

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## [Does these attributes are defined by buildingSMART or not?](https://forums.buildingsmart.org/t/does-these-attributes-are-defined-by-buildingsmart-or-not/1371)

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**Author:** [@Tandeep](https://forums.buildingsmart.org/u/Tandeep)\
**Replies:** 15\
**Last updated:** [June 3, 2019, 5:19pm UTC](https://forums.buildingsmart.org/t/does-these-attributes-are-defined-by-buildingsmart-or-not/1371 "2019-06-03T17:19:05Z")

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Good evening everyone. i was working on IFC export , and faced certain new issue in finding some data in IFC files. ISSUE1: which Attribute/Entitie store the clear cover or side cover etc. Means covers provided during …