# Multiple definitions with similar root entity

**URL:** <https://forums.buildingsmart.org/t/multiple-definitions-with-similar-root-entity/2678>\
**Category:** MVDs\
**Tags:** ifc4\
**Created:** [May 7, 2020, 2:01pm UTC](https://forums.buildingsmart.org/t/multiple-definitions-with-similar-root-entity/2678 "2020-05-07T14:01:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KavehAll](https://avatars.discourse-cdn.com/v4/letter/k/a4c791/32.png) [@KavehAll](https://forums.buildingsmart.org/u/KavehAll)\
**Post date:** [May 7, 2020, 2:01pm UTC](https://forums.buildingsmart.org/t/multiple-definitions-with-similar-root-entity/2678/1 "2020-05-07T14:01:29Z")

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By MVD implementation in IfcDoc, Would it be ok to have multiple table definitions with the same root entity, with difference in their attributes/concepts/constraints ?I have not seen anything for or against it!  
Thanks,  
Kaveh