Constrained Resource Identifiers

Document Type Expired Internet-Draft (core WG)
Author Klaus Hartke 
Last updated 2020-09-10 (latest revision 2020-03-09)
Replaces draft-hartke-t2trg-ciri
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Constrained Resource Identifier (CRI) is a complement to the Uniform Resource Identifier (URI) that serializes the URI components in Concise Binary Object Representation (CBOR) instead of a sequence of characters. This simplifies parsing, comparison and reference resolution in environments with severe limitations on processing power, code size, and memory size.


Klaus Hartke (

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