draciti/Life-stage-obo — pull request #3 by cmungall (2014-03-09 22:14:07+00:00)
Title: Relation stanza declarations and header tag

Made changes to conform to obo-format 1.4 and http://code.google.com/p/developmental-stage-ontologies/

* Added an ontology tag. This should be 'wbls' (all lower case)
* Added a stanza for part_of (see issue #1)
* Added xref for PURL for preceded_by (but see also issue #2)
* Removed stanza for is_a (this is a built-in predicate in obo-format)