ⓘ Computer file formats ..

Document file format

A document file format is a text or binary file format for storing documents on a storage media, especially for use by computers. There currently exist a multitude of incompatible document file formats. A rough consensus was established that XML is a technical basis for future document formats, although PDF is likely to remain the format of fixed-layout documents. Examples of XML-based open standards with DocBook, XHTML, and, more recently, ISO / IEC standards OpenDocument ISO 26300:2006 Office open XML ISO standard 29500:2008. In 1993 the ITU-T tried to establish a standard document forma ...

.DS Store

In the Apple macOS operating system.DS_Store is a file that stores custom attributes of its containing folder, such as the position of icons or the choice of a background image. The name is an abbreviation of Desktop Services Store, reflecting its purpose. It is created and maintained by the Finder application in every folder, and has functions similar to the file desktop.ini in Microsoft Windows. Starting with a full stop character, it is hidden in Finder and many Unix utilities. Its internal structure is proprietary.

Dyadic Encoding

Dyadic Encoding is a form of binary encoding defined by Smullyan commonly used in computational complexity theory 1s and 2s that is bijective and has the "technical advantage, not shared by binary, of setting up a one-to-one correspondence between finite strings and numbers." Coding dyadic works, using the recursive definition of concatenation of strings of 1S and 2s together using the following formula. Dya2n + 2 = dyan2 Even numbers. Dya2n + 1 = dyan1 Odd numbers. Dya0 = ξ empty string. For example: The numerical value N {\the style property display value n} of rows of D K ⋯ D 2 D 1 {\th ...

Execute Channel Program

In IBM mainframe operating systems, Execute Channel Program is a supervisor call for low-level device access, where the programmer is responsible for providing a channel program - a list of device-specific commands - to be executed by I/O channels, control units and devices. EXCP for OS/360 and successors is more specifically described in the OS System Programmers Guide., EXCP for DOS/360 and successors is more specifically described in DOS Supervisor and I/O Macros. This article mostly reflects OS/360 through, some details are different for TOS/360 and DOS/360 through z/VSE.

Execute Direct Access Program

In IBM mainframe operating systems, Execute Direct Access Program is a pseudo access method for accessing direct access datasets on a block by block basis. XDAP is more specifically described in the OS System Programmers Guide.

EXtended Triton Format

eXtended Triton Format is a file format developeded by Triton Imaging, Inc for recording hydrographic survey data. XTF is the most commonly used format for this type of information in the hydrographic survey industry. XTF supports sources including sidescan sonar, shallow seismic and multibeam bathymetry, as well as associated position and altitude information.

GIFT (file format)

The GIFT format is a "wiki-like" markup language for describing tests, originally proposed by Paul Shew in 2003. It is associated with the Moodle course management system.

Input/Output Supervisor

The Input/Output Supervisor is that portion of the control program in the IBM mainframe OS/360 and successors operating systems which issues the privileged I/O instructions and supervises the resulting I/O interruptions for any program which requests I/O device operations until the normal or abnormal conclusion of those operations.


ISO/IEC JTC 1/SC 34, Document description and processing languages is a subcommittee of the ISO/IEC JTC1 joint technical committee, which is a collaborative effort of both the International Organization for Standardization and the International Electrotechnical Commission, which develops and facilitates standards within the field of document description and processing languages. The international secretariat of ISO/IEC JTC 1/SC 34 is the Japanese Industrial Standards Committee located in Japan.

MPX Microsoft Project Exchange File Format

MPX Microsoft Project File Exchange Format is a file format developed by Microsoft which was introduced with Microsoft Project 4.0 for sharing project data with other project management applications. It was adopted by other project management applications, such as Primavera Project Planner and Sciforma. Microsoft discontinued the ability to save in the MPX format with Microsoft Project 2000, but the ability to read the MPX format is supported up to Microsoft Project 2010.