Term/typedef in feature_property.obo

[puethe]

Hi,

I'm working on setting up a new Chado database from scratch with minimum amount of hardcoding. feature_property.obo definitely is a great help for that.

However, I noticed that all entries are in 'typedef' stanzas. From other ontologies (e.g. GO), I learned that 'typedef' stanzas are only used for relationships (and thus I store those in Chado with flag is_relationshiptype=1). This is also how I understood it from the OBO format guide.

Certain entries (such as 'linked_to') certainly qualify as relationships, whereas others (such as 'aminoacid') certainly don't. Would there be a way to reflect this in the stanza type? This would be a great help for me.

Thanks, Christoph

P.S. one more minor thing: The header contains two 'default-namespace' lines, one of which has the value 'unknown'. I assume we can do without that - might prevent ambiguities, depending on employed obo parser.