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Uniform Resource Characteristic

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Uniform Resource Characteristics (URCs) are metadata describing entities which usually available by means of URL or URN resolution.

URCs are mentioned in some documents (e.g. RFC 1737, RFC 2483) and they were the subject of IETF URC Working Group.

In particular, RFC 1737 states that "URC is a set of meta-level information about a resource. Some examples of such meta-information are: owner, encoding, access restrictions (perhaps for particular instances), cost."