http://www.rfc-editor.org/rfc/rfc6570.txt
RFC 6570: URI Template, J. Gregorio, R. Fielding, M. Hadley, M. Nottingham, D. Orchard2012-03-01T23:00:00-00:00A URI Template is a compact sequence of characters for describing a range of Uniform Resource Identifiers through variable expansion. This specification defines the URI Template syntax and the process for expanding a URI Template into a URI reference, along with guidelines for the use of URI Templates on the Internet. [STANDARDS-TRACK]