The tag URI scheme is a uniform resource identifier (URI) scheme for unique identifiers called tags, defined by RFC 4151 in October 2005.[1][2]
The RFC identifies four requirements for tags:[1]
Identifiers are likely to be unique across space and time, and come from a practically inexhaustible supply.
Identifiers are relatively convenient for humans to mint (create), read, type, remember etc.
No central registration is necessary, at least for holders of domain names or email addresses; and there is negligible cost to mint each new identifier.
The identifiers are independent of any particular resolution scheme.
Tags are used extensively in YAML.[3]
^ abKindberg, T.; Hawke, S. (October 2005). "The 'tag' URI Scheme". Internet Engineering Task Force. Retrieved 1 September 2015.
The tagURIscheme is a uniform resource identifier (URI) scheme for unique identifiers called tags, defined by RFC 4151 in October 2005. The RFC identifies...
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1: IPP URL Scheme. doi:10.17487/RFC3510. RFC 3510. Internet Printing Protocol (IPP) over HTTPS Transport Binding and the 'ipps' URIScheme. doi:10.17487/RFC7472...
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