![]() A registration in the vendor tree may be created by anyone who needs to interchange files associated with some software product or set of products. Industry consortia as well as non-commercial entities can register media types in the vendor tree. The terms "vendor" and "producer" are considered equivalent in the context. tree prefix: type "/" "vnd." subtype *Įxamples: application/vnd.ms-excel, application/. The vendor tree includes media types associated with publicly available products. Registrations in the standards tree must be either associated with IETF specifications approved directly by the IESG, or registered by an IANA recognized standards-related organization. The standards tree does not use any tree prefix: type "/" subtype *Įxamples: application/javascript, image/png. New registration trees may be created by IETF Standards Action for external registration and management by well-known permanent organizations (e.g. These registration trees were first defined in November 1996 (obsoleted RFC 2048 - currently RFC 6838). Currently the following trees are created: standard (no prefix), vendor ( vnd. For the efficiency and flexibility of the media type registration process, different structures of subtypes can be registered in registration trees that are distinguished by the use of tree prefixes. pjp) Īll media types should be registered using the IANA registration procedures. Parameter values are usually case-sensitive, but may be interpreted in a case-insensitive fashion depending on the intended use. Types, subtypes, and parameter names are case-insensitive. In this example, text is the type, html is the subtype, and charset=UTF-8 is an optional parameter indicating the character encoding.Ī subtype typically consists of a media format, but it may or must also contain other content, such as a tree prefix, producer, product or suffix, according to the different rules in registration trees. ![]() Īs an example, an HTML file might be designated text/html charset=UTF-8. ![]() Īn unofficial top-level name in common use is chemical. By December 2020, the registered types included the foregoing, plus font, example, and model. ![]() Type "/" subtype * Īs of November 1996, the registered types were: application, audio, image, message, multipart, text and video. A media type can optionally define a suffix and parameters: A media type consists of a type and a subtype, which is further structured into a tree. ![]()
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