# Missing EL_CONSTRAINED

**Category:** [BMM/Expressions](https://discourse.openehr.org/c/bmm-el/60)
**Created:** 2020-11-12 19:08 UTC
**Views:** 565
**Replies:** 2
**URL:** https://discourse.openehr.org/t/missing-el-constrained/1102

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## Post #1 by @Bert_Verhees

Hi Thomas, the EL_CONSTRAINED class is missing although called as parent from EL_BOOLEAN_EXPRESSION
I don't know what you are planning to put into it.  So I used an empty one.

Maybe you can work this out when you have time.

Thanks very much
Bert

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## Post #2 by @thomas.beale

Now fixed - thanks for the catch. But it's [not very interesting](https://specifications.openehr.org/releases/LANG/latest/bmm.html#_el_constrained_class)...

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## Post #3 by @Bert_Verhees

Thanks Thomas, very kind of you.

Best regards
Bert

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**Canonical:** https://discourse.openehr.org/t/missing-el-constrained/1102
**Original content:** https://discourse.openehr.org/t/missing-el-constrained/1102