# Missing type in generic class call

**Category:** [BMM/Expressions](https://discourse.openehr.org/c/bmm-el/60)
**Created:** 2020-08-30 15:57 UTC
**Views:** 591
**Replies:** 1
**URL:** https://discourse.openehr.org/t/missing-type-in-generic-class-call/954

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## Post #1 by @Bert_Verhees

Hi Thomas, 

The BMM_ASSIGNMENT class has a property called "target" of type EL_INSTANTIABLE_REF, I think this this is a generic class and should have a type as parameter.

Best regards
Bert

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## Post #2 by @thomas.beale

You are right - but UML is too dumb to know that - it should show the type as `EL_INSTANTIABLE_REF<BMM_INSTANTIABLE>`. I will try to add this correction to the UML extractor. Yet another justification for BMM ;)

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**Canonical:** https://discourse.openehr.org/t/missing-type-in-generic-class-call/954
**Original content:** https://discourse.openehr.org/t/missing-type-in-generic-class-call/954