Related to graphology/graphology#497
It seems to me the specs are not particularly precise regarding what the <meta> section should accept, but the xsd schema seems to indicate you should only be able to specify <creator>, <description> and <keywords>. What's more, I think I already found gexf in the wild having arbitrary tags there, notably <title>.
Should we amend the xsd schema to fit usage? Am I hallucinating this usage? What was meant to be accepted here?