Search functionality fails to find classes with multilingual labeling

[jvendetti]

Originally reported by Martin on the Musen Lab Slack workspace: https://musenlab.slack.com/archives/C010EAWS60J/p1697495995716159.

The ENVTHES SKOS-format ontology has a class with an English lexical label of "amphibians". Accessible via this REST call:

https://data.bioontology.org/ontologies/ENVTHES/classes/http%3A%2F%2Fvocabs.lter-europe.net%2FEnvThes%2F20624

When using the classes endpoint, the prefLabel is listed using the English lexical label:

However, a REST call using the search endpoint returns no matches:

https://data.bioontology.org/search?q=amphibians&ontologies=ENVTHES

The class in question uses multilingual labeling with 3 labels for English, Japanese, and Chinese:

skos:prefLabel "amphibians"@en, "両棲綱"@ja, "两栖动物"@zh;

If you issue a REST call where also_search_properties is set to true, the class is located, presumably because all of the property values are examined:

https://data.bioontology.org/search?q=amphibians&ontologies=ENVTHES&also_search_properties=true

In this case, the result set displays a Japanese lexical label.

[jvendetti]

There are other issues that cover problems with multilingual labeling, e.g., #91. However, it doesn't appear that any of them describe this particular use case where search is failing.

[syphax-bouazzouni]

fixed in Agroportal with this ontoportal-lirmm#94 (I will do PR for Ontoportal once it is released, ontoportal-lirmm/bioportal_web_ui#337)