Thanks to Red for finding this:
NISO Issues “Best Practices for Designing Web Services in the Library Context”
The National Information Standards Organization (NISO) Web Services and Practices working group has completed NISO RP 2006-01, Best Practices for Designing Web Services in the Library Context. This new Recommend Practice publication covers the following areas: HTTP caching, filtering of user input, reuse of output formats, security, and throttling. The document also describes typical output formats used in web services DTD, XML schema, RDF, Relax NG, and DSD…
The url for the document itself:
http://www.niso.org/standards/resources/rp-2006-01.pdf
