The Classical Works Knowledge Base (CWKB) is a new service of the American Philological Association developed under the direction of Eric Rebillard (Cornell University). The project was supported by a grant made to the American Philological Association (APA) in 2010 by the Andrew W. Mellon Foundation.
CWKB contain information for the retrieval of citations from ancient Greek and Latin texts--from Homer (8 c. BC) to Bede (mid 8 c. AD)-- in the following online resources: Brepols Library of Latin Texts, Perseus Library, PHI Latin Texts, Thesaurus Linguae Graecae.
CWKB adopts an OpenURL approach. It is both a relational database and a link resolver software. The relational database stores metadata about authors and works; the link resolver parses the OpenURLs, makes a lookup in the relational database, and returns links to digital libraries of Greek and Latin literatures.
For more information, go to this website: http://cwkb.org