2009/11/23: BP, dev call:o bsoleted as discussed in tracker https://sourceforge.net/tracker/?func=detail&aid=2899860&group_id=177891&atid=886178 . Should be replaced by instead creating defined classes for materials, which are specified output of the process that conveys the

obsolete_results_from

http://purl.obolibrary.org/obo/IAO_0000123

http://purl.obolibrary.org/obo/IAO_0000103