RFC 5234: Augmented BNF for Syntax Specifications: ABNF

Internet technical specifications often need to define a formal syntax. Over the years, a modified version of Backus-Naur Form (BNF), called Augmented BNF…

Read RFC 5234 on the RFC Editor

Outgoing relationships (3 related RFCs)

Obsoletes — RFC 4234: Augmented BNF for Syntax Specifications: ABNF
Informative reference — RFC 822: STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES
Informative reference — RFC 733: Standard for the format of ARPA network text messages

Incoming relationships (286 related RFCs)

Showing 50 of 286 related RFCs.

Updated by — RFC 7405: Case-Sensitive String Support in ABNF
Normatively referenced by — RFC 6020: YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)
Normatively referenced by — RFC 7950: The YANG 1.1 Data Modeling Language
Normatively referenced by — RFC 8040: RESTCONF Protocol
Normatively referenced by — RFC 5322: Internet Message Format
Normatively referenced by — RFC 6838: Media Type Specifications and Registration Procedures
Normatively referenced by — RFC 8259: The JavaScript Object Notation (JSON) Data Interchange Format
Normatively referenced by — RFC 5646: Tags for Identifying Languages
Normatively referenced by — RFC 7252: The Constrained Application Protocol (CoAP)
Normatively referenced by — RFC 5245: Interactive Connectivity Establishment (ICE): A Protocol for Network Address Translator (NAT) Traversal for Offer/Answer Protocols
Normatively referenced by — RFC 6335: Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry
Normatively referenced by — RFC 6733: Diameter Base Protocol
Normatively referenced by — RFC 5424: The Syslog Protocol
Normatively referenced by — RFC 7951: JSON Encoding of Data Modeled with YANG
Normatively referenced by — RFC 6350: vCard Format Specification
Normatively referenced by — RFC 5576: Source-Specific Media Attributes in the Session Description Protocol (SDP)
Normatively referenced by — RFC 6454: The Web Origin Concept
Normatively referenced by — RFC 6750: The OAuth 2.0 Authorization Framework: Bearer Token Usage
Normatively referenced by — RFC 7235: Hypertext Transfer Protocol (HTTP/1.1): Authentication
Normatively referenced by — RFC 6679: Explicit Congestion Notification (ECN) for RTP over UDP
Normatively referenced by — RFC 5888: The Session Description Protocol (SDP) Grouping Framework
Normatively referenced by — RFC 7540: Hypertext Transfer Protocol Version 2 (HTTP/2)
Normatively referenced by — RFC 5545: Internet Calendaring and Scheduling Core Object Specification (iCalendar)
Normatively referenced by — RFC 6532: Internationalized Email Headers
Normatively referenced by — RFC 6570: URI Template
Normatively referenced by — RFC 6363: Forward Error Correction (FEC) Framework
Normatively referenced by — RFC 6690: Constrained RESTful Environments (CoRE) Link Format
Normatively referenced by — RFC 7616: HTTP Digest Access Authentication
Normatively referenced by — RFC 8866: SDP: Session Description Protocol
Normatively referenced by — RFC 7468: Textual Encodings of PKIX, PKCS, and CMS Structures
Normatively referenced by — RFC 8224: Authenticated Identity Management in the Session Initiation Protocol (SIP)
Normatively referenced by — RFC 7469: Public Key Pinning Extension for HTTP
Normatively referenced by — RFC 7489: Domain-based Message Authentication, Reporting, and Conformance (DMARC)
Normatively referenced by — RFC 9460: Service Binding and Parameter Specification via the DNS (SVCB and HTTPS Resource Records)
Normatively referenced by — RFC 5802: Salted Challenge Response Authentication Mechanism (SCRAM) SASL and GSS-API Mechanisms
Normatively referenced by — RFC 5987: Character Set and Language Encoding for Hypertext Transfer Protocol (HTTP) Header Field Parameters
Normatively referenced by — RFC 6901: JavaScript Object Notation (JSON) Pointer
Normatively referenced by — RFC 7617: The 'Basic' HTTP Authentication Scheme
Normatively referenced by — RFC 8941: Structured Field Values for HTTP
Normatively referenced by — RFC 5435: Sieve Email Filtering: Extension for Notifications
Normatively referenced by — RFC 5801: Using Generic Security Service Application Program Interface (GSS-API) Mechanisms in Simple Authentication and Security Layer (SASL): The GS2 Mechanism Family
Normatively referenced by — RFC 6531: SMTP Extension for Internationalized Email
Normatively referenced by — RFC 7838: HTTP Alternative Services
Normatively referenced by — RFC 8141: Uniform Resource Names (URNs)
Normatively referenced by — RFC 8285: A General Mechanism for RTP Header Extensions
Normatively referenced by — RFC 8839: Session Description Protocol (SDP) Offer/Answer Procedures for Interactive Connectivity Establishment (ICE)
Normatively referenced by — RFC 5617: DomainKeys Identified Mail (DKIM) Author Domain Signing Practices (ADSP)
Normatively referenced by — RFC 6364: Session Description Protocol Elements for the Forward Error Correction (FEC) Framework
Normatively referenced by — RFC 6501: Conference Information Data Model for Centralized Conferencing (XCON)
Normatively referenced by — RFC 6544: TCP Candidates with Interactive Connectivity Establishment (ICE)