# Missing attributes in XSD

**URL:** <https://forums.buildingsmart.org/t/missing-attributes-in-xsd/4025>\
**Category:** Developers\
**Tags:** xsd\
**Created:** [December 13, 2021, 12:30pm UTC](https://forums.buildingsmart.org/t/missing-attributes-in-xsd/4025 "2021-12-13T12:30:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![dansi](https://avatars.discourse-cdn.com/v4/letter/d/ce73a5/32.png) [@dansi](https://forums.buildingsmart.org/u/dansi)\
**Post date:** [December 13, 2021, 12:30pm UTC](https://forums.buildingsmart.org/t/missing-attributes-in-xsd/4025/1 "2021-12-13T12:30:56Z")

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Hi,

There seem to be missing attributes in ifcXML4.xsd. (The long version)  
All inverse relations are missing. Maybe I`m missing a point here…

Comparing IfcObjectDefinition in both exp and xsd definitions.