# FILE\_SCHEMA vs. Schema Version

**URL:** <https://forums.buildingsmart.org/t/file-schema-vs-schema-version/2750>\
**Category:** Developers\
**Tags:** ifc4, 4x3alpha\
**Created:** [June 5, 2020, 11:16am UTC](https://forums.buildingsmart.org/t/file-schema-vs-schema-version/2750 "2020-06-05T11:16:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Steffen.Rabe](https://avatars.discourse-cdn.com/v4/letter/s/d07c76/32.png) [@Steffen.Rabe](https://forums.buildingsmart.org/u/Steffen.Rabe)\
**Post date:** [June 5, 2020, 11:16am UTC](https://forums.buildingsmart.org/t/file-schema-vs-schema-version/2750/1 "2020-06-05T11:16:10Z")

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Hello all, we faced some difficulties to import IFC4 files. The FILE\_SCHEMA tag indicated IFC4  
FILE\_SCHEMA((‘IFC4’), but finally it contains data based on Schema version 4.0.2, IFC4 Add2, with some new items. As we are using a generative importer to make sure the schema is correct, we like to know the real schema content of a file and not only the major version. Version 4 already has a lot of addendum and extensions. So I like to know how to judge the correct Schema Version of an IFC4 file.

Maybe there is already a clear definition I to identify the correct schema version. Just refer to the ifs-schema-specifications page (not allowed to add a link to the buildingsmart side)

Every hint welcome. Thanks a lot.