Base64 MIME transfer encoding.
Backward or downward compatibility.
ECMAScript Language Specification. Standard ECMA-262, edition 5.1, June 2011.
Forward or upward compatibility.
hCard Profile W3C experimental XMDP profile for the hCard specification.
ISO 639: Codes for the Representation of Names of Languages.
JSON. JavaScript Object Notation. Wikipedia.
json-schema.org. The home of JSON Schema. Formal JSON schema specification.
Wikipedia list of programming languages.
Model-view-controller (MVC). Wikipedia.
PEM: Privacy-enhanced Electronic Mail.
Representational state transfer. Wikipedia.
RFC 1035: Domain names - implementation and specification.
RFC 1738: Uniform Resource Locators (URL).
RFC-1939: Post Office Protocol.
Multipurpose Internet Mail Extensions.
RFC 2119, BCP 14: Key words for use in RFCs to Indicate Requirement Levels.
RFC 2616 Hypertext Transfer Protocol.
Hypertext Transfer Protocol – HTTP/1.1. Section 9 - Method Definitions.
RFC 2616 Hypertext Transfer Protocol, Status definitions.
RFC 2822: Internet Message Format.
Application and Sub Application Identity Policy Element for Use with RSVP.
RFC 3066: Tags for the Identification of Languages.
RFC-3501: Internet Message Access Protocol.
Extensible Messaging and Presence Protocol (XMPP): Core.
The application/json Media Type for JavaScript Object Notation (JSON).
RFC-5321: Simple Mail Transfer Protocol.
RNG. RELAX NG compact syntax specification. OASIS Committee Specification, 21 November 2002.
RNG. RELAX NG specification. OASIS Committee Specification, 3 December 2001.
ISO 8601 Data elements and interchange formats. Wikipedia.
X.509: Public key infrastructure and privilege management infrastructure.
XML Signature Syntax and Processing (Second Edition). W3C Recommendation 10 June 2008.
Extensible Markup Language (XML) 1.0 (Fourth Edition). 2.12 Language Identification. W3C Recommendation, 16 August 2006.
Namespaces in XML (Second Edition). W3C Recommendation, 16 Aug 2006.