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A few questions about the specs... I'm confused about the //explain/serverInfo/database element and its meaning(s). My questions are based on confused readings of documents on the official ZNG SRW/U site and the explain.z3950.org DTD "commentary". And, obviously, no small measure of ignorance (impatience?) on my part. First, the overloaded meaning that: - if it's Z39.50, "database" means the name of the database, but - if it's not Z39.50, "database" *may* mean the url path to the query script ...is particularly confusing and the documentation itself doesn't make things clearer. Might there instead be two elements, "database" and "script path", that unambiguously define each, with each being optional? Second, may the serverInfo element repeat? If not, and you provide separate paths to both SRU and SRW (say, unalog.com/srw/ and unalog.com/sru/, as an example), is the answer to say serverInfo[@protocol='SRW/U'] and then to duplicate the database element with one path for SRU and another for SRW? Hopefully not. :) The Zeerex commentary and overview docs at explain.z3950.org do not indicate whether serverInfo may repeat (I think), and the DTDs listed as the "current version" in section 2 at http://explain.z3950.org/dtd/ lead to 404 errors. Assuming the most recent "older version" from section 3 on the same page, DTD v2.0, is either the most current or close to it, the DTD itself seems to indicate that serverInfo must appear once, and cannot repeat. This kind of issue is getting in the way of knowing how to implement my own service properly, and surely it makes it more difficult to know how to implement a compliance testing service such as the one Ralph has kindly shared. Separately, is the scan action required for base-level compliance? There is no mention of it on the "Base Profile" page at: http://www.loc.gov/z3950/agency/zing/srw/base-profile.html Thanks, -Dan -- Daniel Chudnov Yale Center for Medical Informatics (203) 737-5789