An Internet media type,^[1] originally called a MIME type after MIME and sometimes a Content-type after the name of a header in several protocols whose value is such a type, is a two-part identifier for file formats on the Internet. The identifiers were originally defined in RFC 2046 for use in e-mail sent through SMTP, but their use has expanded to other protocols such as HTTP and SIP. Multipurpose Internet Mail Extensions (MIME) is an Internet Standard that extends the format of e-mail to support text in character sets other than US-ASCII, non-text attachments, multi-part message bodies, and header information in non-ASCII character sets. ... A file format is a particular way to encode information for storage in a computer file. ... Simple Mail Transfer Protocol (SMTP) is the de facto standard for email transmission across the Internet. ... HTTP (for HyperText Transfer Protocol) is the primary method used to convey information on the World Wide Web. ... The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. ...

A media type is composed of at least two parts: a type, a subtype, and one or more optional parameters. For example, subtypes of text type has an additional charset parameter that can be included to indicate the character encoding, and subtypes of multipart type often define a boundary between parts. A character encoding consists of a code that pairs a sequence of characters from a given set with something else, such as a sequence of natural numbers, octets or electrical pulses, in order to facilitate the storage of text in computers and the transmission of text through telecommunication networks. ...

Types that begin with "x-" are nonstandard -- they not registered with IANA.^[2] Subtypes that begin with vnd. are vendor-specific.^[3] The Internet Assigned Numbers Authority (IANA) is an organisation that oversees IP address, top level domain and Internet protocol code point allocations. ...

List of common media types

IANA manages a registry of media types and character encodings. The organization makes a list available to the public through the Web. Some of the more notable media types used on the Web are listed below: For other uses of IANA, see IANA (disambiguation). ... A character encoding consists of a code that pairs a sequence of characters from a given set with something else, such as a sequence of natural numbers, octets or electrical pulses, in order to facilitate the storage of text in computers and the transmission of text through telecommunication networks. ...

• Type audio: Audio
  • audio/mpeg: MP3 or other MPEG audio
  • audio/x-ms-wma: Windows Media Audio
  • audio/x-realaudio: RealAudio
  • audio/x-wav: WAV audio
• Type example
• Type image
  • image/gif: GIF image
  • image/jpeg: JPEG JFIF image
  • image/png: Portable Network Graphics
  • image/tiff: Tag Image File Format
• Type message
• Type model: 3D models
• Type multipart: Archives and other objects made of more than one part
  • multipart/mixed or multipart/alternative: MIME e-mail
• Type text: Human-readable text and source code
  • text/css: Cascading Style Sheets
  • text/html; charset=UTF-8: HTML in the UTF-8 character encoding
  • text/javascript: Depreciated. RFC 4329 replaces this type with application/javascript.
  • text/plain; charset=ISO 8859-1: Textual data in ISO 8859-1 character encoding
  • text/plain; charset=UTF-8: Textual data in the UTF-8 character encoding
• Type video: Video
  • video/mpeg: MPEG-1 video with multiplexed audio
  • video/x-ms-wmv: Windows Media Video
  • video/x-shockwave-flash: Adobe Flash video
• Type application: Multipurpose files
  • application/javascript: ECMAScript (such as JavaScript)
  • application/octet-stream: arbitrary byte streams otherwise unspecified. This is thought of as the "default" media type used by several operating systems, often used to identify executable files, files of unknown type, or files that should be downloaded in protocols that do not provide a separate "content disposition" header. RFC 2046 specifies this as the fallback for unrecognized subtypes of other types.
  • application/ogg: Ogg, a multimedia bitstream container format
  • application/postscript: PostScript program, often used to define a page to be printed.
  • application/xhtml+xml; charset=UTF-8: XHTML, a successor to HTML, in UTF-8 encoding

Audio can mean: Sounding that can be heard. ... MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners. ... The Moving Picture Experts Group or MPEG is a working group of ISO/IEC charged with the development of video and audio encoding standards. ... Windows Media Audio (WMA) is a proprietary compressed audio file format developed by Microsoft. ... RealAudio is a proprietary audio format developed by RealNetworks. ... WAV (or WAVE), short for Waveform audio format, is a Microsoft and IBM audio file format standard for storing audio on PCs. ... An example of a GIF image. ... In computing, JPEG(pronounced JAY-peg; IPA: ) is a commonly used standard method of compression for photographic images and not for movie files for which MPEG compression is used. ... PNG (Portable Network Graphics), sometimes pronounced as ping, is a relatively new bitmap image format that is becoming popular on the World Wide Web and elsewhere. ... This article is about TIFF, the computer image format. ... Multipurpose Internet Mail Extensions (MIME) is an Internet Standard that extends the format of e-mail to support text in character sets other than US-ASCII, non-text attachments, multi-part message bodies, and header information in non-ASCII character sets. ... Wikipedia does not yet have an article with this exact name. ... The term text has multiple meanings depending on the context of its use: In language, text is a broad term for something that contains words to express something. ... Source code (commonly just source or code) is any series of statements written in some human-readable computer programming language. ... In computing, Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. ... In computing, HyperText Markup Language (HTML) is the predominant markup language for the creation of web pages. ... UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode created by Ken Thompson and Rob Pike. ... ISO 8859, more formally ISO/IEC 8859, is a joint ISO and IEC standard for 8-bit character encodings for use by computers. ... UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode created by Ken Thompson and Rob Pike. ... Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images which represent scenes in motion. ... MPEG-1 defines a group of Audio and Video (AV) coding and compression standards agreed upon by MPEG (Moving Picture Experts Group). ... Windows Media Video (WMV) is a generic name for the set of video codec technologies developed by Microsoft. ... Adobe Flash (formerly Macromedia Flash and before that FutureSplash Animator), or simply Flash, refers to both the Adobe Flash Player and to a multimedia authoring program used to create content for the Adobe Engagement Platform (such as web applications, games and movies). ... ECMAScript is a scripting programming language, standardized by Ecma International in the ECMA-262 specification. ... JavaScript is the name of Netscape Communications Corporations implementation of the ECMAScript standard, a scripting language based on the concept of prototype-based programming. ... A byte stream is an abstraction used in computer science to describe a particular kind of communication channel between two entities. ... An operating system (OS) is a computer program that manages the hardware and software resources of a computer. ... OGG can refer to several items: Ogg is a multimedia bitstream container, used for audio and video files, especially Vorbis audio files. ... A container format is a computer file format that can contain various types of data, compressed by means of standardized codecs. ... PostScript (PS) is a page description language and programming language used primarily in the electronic and desktop publishing areas. ... It has been suggested that XHTML_Modularization be merged into this article or section. ...

References

1. ^ Internet Media Type registration, consistency of use. W3C (2002-06-03). Retrieved on 2006-11-29.
2. ^ Freed, N. (November 1996). RFC 2045 - Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies 15 (section 6.3). IETF. Retrieved on 2006-11-29.
3. ^ Freed, N.; Klensin, J., Postel, J. (November 1996). RFC 2048 - Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures 3-4 (section 2.1.2). IETF. Retrieved on 2006-11-29.