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In hunting for data to help model subject faceting for MARC records, I've just been looking at Bill Moen's Zinterop report (http://www.unt.edu/zinterop/ZInterop2/Documents/ZInterop2FinalReport_we m4Dec2005.pdf). It occurs to me that with all our various projects working on indexing MARC records in Solr, we should set up and distribute a set of "radioactive records" to use in each project to diagnose and compare indexing and querying behaviour. Probably we could just use the Zinterop records (which are described in detail in that pdf but aren't available for download anywhere I could find); but we might want to enhance them with data suitable for testing our faceting systems. Not sure what that would mean but I thought I'd throw it out. If you were at Access '05, you heard Bill describe the Z39.50 testing he was doing with radioactive records: records with known unique values in all indexed fields, that could be used for automated testing of Z39.50 search functionality. The same approach might be very useful as we feel our way towards a Solr MARC indexing system. Has anyone already done something like this? Peter Peter Binkley Digital Initiatives Technology Librarian Information Technology Services 4-30 Cameron Library University of Alberta Libraries Edmonton, Alberta Canada T6G 2J8 Phone: (780) 492-3743 Fax: (780) 492-9243 e-mail: [log in to unmask]