Map STY:T167 to biolink:ChemicalEntity

[gaurav]

Is your feature request related to a problem? Please describe.
Some UMLS terms are missing from the NCATS Translator Node Normalization tool (NCATSTranslator/Feedback#425) because they are classified as semantic type T167 "Substance", which does not have a mapping in the Biolink model. It looks like STY:T167 was previously mapped to biolink:ChemicalEntity, but this appears to have been removed at some point. We could include a mapping in Babel (as we've done for previous UMLS STYs, leaving only these identifiers: TranslatorSRI/NodeNormalization#119 (comment)), but it would be better if we could map this semantic type directly in the Biolink model.

Describe the solution you'd like
Add STY:T167 as a mapping for a Biolink class, likely either biolink:ChemicalEntity or biolink:ChemicalMixture.

What working group (or team) did this request originate from?
Translator SRI via NCATSTranslator/Feedback#425

Additional context
Add any other context about the problem here.

Tag relevant members for discussion
@cbizon @sierra-moxon

[gaurav]

@sierra-moxon Any thoughts on this issue?

[gaurav]

I took another look at STY:T167 in the UMLS Semantic Network Browser and -- given that it has child concepts of "food", "chemical" and "body substance" (i.e. "saliva, dental enamel, sweat, and gastric acid", etc) -- I think biolink:ChemicalEntity would be the correct mapping. I've updated the title of this issue to reflect this.

[sierra-moxon]

sounds great! added.