The Bio::OntologyIO::InterProParser brings in the requirement on the libxml-perl distribution (for the XML::Parser::PerlSAX module) which is something that causes people issues (see #314).
I'm looking at it and I'm not sure what's the right group of modules to move with it as I'm not familiar with this. I guess there is Bio::OntologyIO::Handlers::InterProHandler. But there is also a Bio::Ontology::InterProTerm which I don't quite know what it's used for.
@cjfields can you help with this?