Hi, In our recent METS Editorial Board Meeting, a METS Digital Signature working group was charged to come up with a recommendation for how to use XML Signature with METS, and to recommend changes to the METS schema if required to implement XML Signature. A report on the analysis and any recommendations for METS schema changes should be available to the Board at its November 2006 meeting in Boston. I am leading the working group, and I am looking for participants. If you are working in the area of XML Signature and METS, or you have an interest in this topic and would like to participate in this working group, please send me an email with "digital signature" somewhere in the subject line. thanks, Brian