Hello Collective Wisdom -- The EAD Report Card has the following to say about the EADID element: "The content of this element, together with its attributes, must uniquely identify the EAD instance. The <eadid> should include at least one of the following attributes: publicid, identifier, url. See BPG for additional guidance. If using publicid, content is defined in ISO/IEC 9070:1991, intended to be universally unique. If using identifier, content is a machine-readable unique identifier. If using url, content should be expressed in absolute terms (e.g., http://www.loc.gov/ead/ms99999.xml)." Just wondering what most people are using - publicid, identifier or URL -- and pros/cons of the three options. Thanks Michele -=--=--=--=--=--=--=--=--=--=--=--=--=--=- Michele Rothenberger Syracuse University Special Collections Research Center Syracuse, NY -=--=--=--=--=--=--=--=--=--=--=--=--=--=-