# Modernizing the Semantic Layer Spec
**URL:** https://discourse.getdbt.com/t/modernizing-the-semantic-layer-spec/20550
**Category:** In-Depth Discussions
**Tags:** devblog
**Created:** [January 21, 2026, 7:44pm UTC](https://discourse.getdbt.com/t/modernizing-the-semantic-layer-spec/20550 "2026-01-21T19:44:33Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@system](https://discourse.getdbt.com/u/system)
#### Post date: [January 21, 2026, 7:44pm UTC](https://discourse.getdbt.com/t/modernizing-the-semantic-layer-spec/20550/1 "2026-01-21T19:44:33Z")
This is a companion discussion topic for the original entry at [Modernizing the Semantic Layer Spec | dbt Developer Blog](https://docs.getdbt.com/blog/modernizing-the-semantic-layer-spec)
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### Author:  [@silja.mardla](https://discourse.getdbt.com/u/silja.mardla)
#### Post date: [February 18, 2026, 7:38am UTC](https://discourse.getdbt.com/t/modernizing-the-semantic-layer-spec/20550/2 "2026-02-18T07:38:20Z")
What if the same dbt model is used in two **different** semantic models?
Example: we have a dim\_person table and we want to specify different relations for it in the context of the person being a customer or a partner.
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### Author:  [@system](https://discourse.getdbt.com/u/system)
#### Post date: [February 18, 2026, 7:38am UTC](https://discourse.getdbt.com/t/modernizing-the-semantic-layer-spec/20550/3 "2026-02-18T07:38:20Z")