Add lang="en" tag to international version pref labels

[janelomax]

In http://purl.obolibrary.org/obo/hp/hp-international.owl the class labels all have explicit lang tags except for the English one e.g.

<rdfs:label xml:lang="fr">Anomalie phénotypique</rdfs:label>
        <rdfs:label xml:lang="es">Anomalía fenotípica</rdfs:label>
        <rdfs:label xml:lang="tr">Fenotipik anormallik</rdfs:label>
        <rdfs:label xml:lang="nl">Fenotypische abnormaliteit</rdfs:label>
        <rdfs:label xml:lang="cs">Fenotypová abnormalita</rdfs:label>
        <rdfs:label>Phenotypic abnormality</rdfs:label>

would it be possible to also have lang="en" tag added to the English labels please?

[pnrobinson]

@janelomax
well, English is the original language and the others are labeled as translations, so it does not seem we would gain anything by adding more complexity to the file. But does this cause a problem on your end?
@matentzn

[janelomax]

In CENtree you can set your default language, and your pref labels will be set to that language in the UI. But when English is your default language and @en isn't set in the ontology, it doesn't know which label to choose so a random language is chosen, triggering a flood of users complaining that HPO was showing up in French etc!

We've switched to using the English rather than the International version of HPO for now, and longer term we're thinking of adding some logic in CENtree that if a label doesn't have a language tag, to assume that it's in the default language.

So we have a work-around, but I still think it would be better to be explicit in the ontology.

[matentzn]

FYI - we could do this just for the hp-international edition - technically this is easy. There are some good arguments to do this just for that specific version, and now harm for us doing it.

But note that we are, on OBO level, striding towards a solution that allows for a single "default" language, without the need for language tags. I think that tools should probably support this no matter what. information-artifact-ontology/ontology-metadata#128. We have previously decided to drop language tags for english in HPO here: #10387.

@pnrobinson let me know if you think its reasonable to add language tags just for the international edition of HPO, or if you think it causes more churn than value. I am fine either way, 5 min job.

[pnrobinson]

It seems relatively straightforward to adapt code to assume that English is the default language if no code is supplied.
Every change to the format of the file causes small problems at our end with software that is reading these files and I think for now it would be easiest if we just try to keep our current formats. @janelomax could you please use whatever workaround? I am assuming this is not enormously onerous.