Computer file formats

A FourCC ("four-character code") is a sequence of four bytes (typically ASCII) used to uniquely identify data formats. It originated from the OSType or ResType metadata system used in classic Mac OS and was adopted for the Amiga/Electronic Arts Interchange File Format and derivatives. The idea was later reused to identify compressed data types in QuickTime and DirectShow.

Android application publishing file format

WebSub (formerly PubSubHubbub) is an open protocol for distributed publish–subscribe communication on the Internet. Initially designed to extend the Atom (and RSS) protocols for data feeds, the protocol can be applied to any data type (e.g. HTML, text, pictures, audio, video) as long as it is accessible via HTTP. Its main purpose is to provide real-time notifications of changes, which improves upon the typical situation where a client periodically polls the feed server at some arbitrary interval. In this way, WebSub provides pushed HTTP notifications without requiring clients to spend resource

NetCDF (Network Common Data Form) is a set of software libraries and self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. The project homepage is hosted by the Unidata program at the University Corporation for Atmospheric Research (UCAR). They are also the chief source of netCDF software, standards development, updates, etc. The format is an open standard. NetCDF Classic and 64-bit Offset Format are an international standard of the Open Geospatial Consortium.

Mobipocket SA was a French company incorporated in March 2000 that created the .mobi e-book file format and produced the Mobipocket Reader software for mobile phones, personal digital assistants (PDA) and desktop operating systems.

PDF/X is a subset of the ISO standard for PDF. The purpose of PDF/X is to facilitate graphics exchange, and it therefore has a series of printing-related requirements which do not apply to standard PDF files. For example, in PDF/X-1a all fonts need to be embedded and all images need to be CMYK or spot colors. PDF/X-3 accepts calibrated RGB and CIELAB colors, while retaining most of the other restrictions of PDF/X-1a.

thumb|upright|Logo of the IGES Project from National Institute of Standards and Technology|NIST The Initial Graphics Exchange Specification (IGES) is a vendor-neutral file format that allows the digital exchange of information among computer-aided design (CAD) systems. It is an ASCII-based textual format.

stand-alone program, part of the Texinfo distribution, which is used to view Info files on a text terminal

text file

IBM disk file storage access method

generalized file format for any kind of data, aiming to be a binary equivalent to XML

file format

file format

Logical Observation Identifiers Names and Codes (LOINC) is a database and universal standard for identifying medical laboratory observations. First developed in 1994, it was created and is maintained by the Regenstrief Institute, a US nonprofit medical research organization. LOINC was created in response to the demand for an electronic clinical care and management database and is publicly available at no cost.

file format

format that is not a free and open format

Electronic Business using eXtensible Markup Language, commonly known as e-business XML, or ebXML (pronounced ) as it is typically referred to, is a family of XML based standards sponsored by OASIS and UN/CEFACT whose mission is to provide an open, XML-based infrastructure that enables the global use of electronic business information in an interoperable, secure, and consistent manner by all trading partners.

file format for representing crystallographic information

text file format

.properties is a file extension for files mainly used in Java-related technologies to store the configurable parameters of an application. They can also be used for storing strings for Internationalization and localization; these are known as Property Resource Bundles.

proprietary format hidden file

file format for storing go (weiqi, baduk) games and other related games

campaign to produce PDF electronic documents that forbid printing

format for expressing data in the RDF data model

.m2ts is a filename extension used for the Blu-ray disc Audio-Video (BDAV) MPEG-2 Transport Stream (M2TS) container file format. It is used for multiplexing audio, video and other streams, such as subtitles. It is based on the MPEG-2 transport stream container. This container format is commonly used for high-definition video on Blu-ray Disc and AVCHD.

family of file formats associated with RFC 1421

Notation3, or N3 as it is more commonly known, is a shorthand non-XML serialization of Resource Description Framework models, designed with human-readability in mind: N3 is much more compact and readable than XML RDF notation. The format is being developed by Tim Berners-Lee and others from the Semantic Web community. A formalization of the logic underlying N3 was published by Berners-Lee and others in 2008.

In the Microsoft Windows operating system, index.dat is a hidden database file used by the Internet Explorer web browser. It functions as an information storage database of recent browser activity, enabling quick access to that information when needed again by Internet Explorer, thus improving browser performance.

3D computer graphics standard created by Pixar

e-book file format

computer program or script written in a valid form of multiple programming languages

machine instruction code that executes properly regardless of where in memory it resides

VMDK (short for Virtual Machine Disk) is a file format that describes containers for virtual hard disk drives to be used in virtual machines like VMware Workstation or VirtualBox.

GNU LibreDWG is a software library programmed in C to manage DWG computer files, native proprietary format of computer-aided design software AutoCAD. It aims to be a free software replacement for the OpenDWG libraries. The project is managed by the Free Software Foundation (FSF).

scheme for encoding arbitrary binary data as plain text

XAVC is a recording format that was introduced by Sony on October 30, 2012. It is licensed to companies that want to make XAVC products.

interactive album artwork format by Apple

Metadata container

REDIRECT Container format

file format for storing CRC32 checksums

open standard for office applications developed in China

file format family

voluntary association

iMelody is a non-polyphonic ringtone exchange object format, used for mobile phones [Extension: .imy], defined by Ericsson and Sony Ericsson together with other manufacturers and is based on Ericsson's proprietary eMelody format. This ringtone format also supports codes that can control the vibration motor, backlight, LED lights and volume of the device. The iMelody format was made because the eMelody had some musical limitations.

DVR-MS (Microsoft Digital Video Recording) is a proprietary video and audio file container format, developed by Microsoft used for storing TV content recorded by Windows XP Media Center Edition, Windows Vista and Windows 7.

metadata container

ISO 24517-1:2008 is an ISO Standard published in 2008.

subdivision of a text file

document format

UN/CEFACT is the United Nations Centre for Trade Facilitation and Electronic Business. It was established as an intergovernmental body of the United Nations Economic Commission for Europe (UNECE) in 1996 and evolved from UNECE's long tradition of work in trade facilitation which began in 1957.

markup language

file format

PDF/VT is an international standard published by ISO in August 2010 as ISO 16612-2. It defines the use of PDF as an exchange format optimized for variable and transactional printing. Built on top of PDF/X-4, it is the first variable-data printing (VDP) format which ensures modern International Color Consortium-based (ICC) color management through the use of ICC Output Intents. It adds the notion of encapsulated groups of graphic objects to support optimized efficient processing for repeating text, graphic or image content. Introducing the concept of document part metadata (DPM), it enables rel

N-Triples is a format for storing and transmitting data. It is a line-based, plain text serialisation format for RDF (Resource Description Framework) graphs, and a subset of the Turtle (Terse RDF Triple Language) format. N-Triples should not be confused with Notation3 which is a superset of Turtle. N-Triples was primarily developed by Dave Beckett at the University of Bristol and Art Barstow at the World Wide Web Consortium (W3C).

NZB is an XML-based file format for retrieving posts from NNTP (Usenet) servers. The format was conceived by the developers of the Newzbin.com Usenet Index. NZB is effective when used with search-capable websites. These websites create NZB files out of what is needed to be downloaded. Using this concept, headers would not be downloaded hence the NZB method is quicker and more bandwidth-efficient than traditional methods.

file format family introduced at Microsoft Office XP and Microsoft Office 2003

file format

set of W3C candidate standards describing electronic compound document file formats that contains multiple formats, such as SVG, XHTML, SMIL and XForms

File compression format

file format