Centroid
A summary of the information contained in a whois++ index used to guide the routing of information queries to the likely source of the information being sought.

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CIP
Common Indexing Protocol (RFC 2651, RFC 2652, RFC 2653)

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IAFA
Internet Anonymous File Archive

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LDAP
Lightweight Directory-access Protocol (RFC 1777)

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RDF
Resource Description Framework

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TIO
A Tagged Index Object for use in the Common Indexing Protocol (RFC 2654)

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URL
Uniform Resource Locator (RFC 1738)

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Whois++
A network information lookup service and associated protocol (RFC 1834, RFC 1385, RFC 1913, RFC 1914)