A short genealogy of unAPI

unAPI has its roots in two well-known library specifications: OpenURL and OAI-PMH
Grandpappy: ContextObjects in Spans (COinS), developed in the first two quarters of 2005
Mama: COinS-PMH, developed in the last two quarters of 2005
The COinS-PMH effort led directly to unAPI, which was developed between late fall 2005 and finalized in June 2006, with interim versions released on a monthly basis (almost)

unAPI has its roots in two well-known library specifications: OpenURL and OAI-PMH