{"draft":"draft-ietf-cbor-cddl-control-07","doc_id":"RFC9165","title":"Additional Control Operators for the Concise Data Definition Language (CDDL)","authors":["C. Bormann"],"format":["HTML","TEXT","PDF","XML"],"page_count":"11","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Concise Binary Object Representation Maintenance and Extensions","abstract":"The Concise Data Definition Language (CDDL), standardized in RFC\r\n8610, provides \"control operators\" as its main language extension\r\npoint.\r\n\r\nThe present document defines a number of control operators that were\r\nnot yet ready at the time RFC 8610 was completed: , , and  for the\r\nconstruction of constants; \/ for including ABNF (RFC 5234 and RFC\r\n7405) in CDDL specifications; and for indicating the use of a\r\nnon-basic feature in an instance.","pub_date":"December 2021","keywords":["binary format","data interchange format","description language","schema language","tree grammar","ABNF","Augmented BNF","feature indication"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9165","errata_url":null}