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An open file format is a file format for storing digital data, defined by a published specification usually maintained by a standards organization, and which can be used and implemented by anyone. For example, an open format can be implemented by both proprietary and free and open source software , using the typical software licenses used by each.
Up until the 2007 version, Microsoft Excel used a proprietary binary file format called Excel Binary File Format (.XLS) as its primary format. [34] Excel 2007 uses Office Open XML as its primary file format, an XML-based format that followed after a previous XML -based format called "XML Spreadsheet" ("XMLSS"), first introduced in Excel 2002.
For example, if the content types file had any relationships, there would be a file called [Content_Types].xml.rels inside the _rels directory. _rels/.rels This file is where the package relationships are located. Applications look here first. Viewing in a text editor, one will see it outlines each relationship for that section.
Office Open XML (also informally known as OOXML) [5] is a zipped, XML-based file format developed by Microsoft for representing spreadsheets, charts, presentations and word processing documents.
Besides differences in the schema, there are several other differences between the earlier Office XML schema formats and Office Open XML. Whereas the data in Office Open XML documents is stored in multiple parts and compressed in a ZIP file conforming to the Open Packaging Conventions, Microsoft Office XML formats are stored as plain single monolithic XML files (making them quite large ...
GP – Guitar Pro sheet music and tablature file; KERN – Kern File Format sheet music file; LY – LilyPond sheet music file; MEI – Music Encoding Initiative file format that attempts to encode all musical notations; MIDI – MIDI file format that is a music sheet for instruments; MUS, MUSX – Finale sheet music file
Predecessor file format Microsoft Office XML formats: OpenOffice.org XML: Standardized by Ecma International, ISO/IEC: OASIS, ISO/IEC: First public release date 2006 2005 First stable version Ecma International Standard ECMA-376 Office Open XML File Formats 1st edition OASIS OpenDocument Format for Office Applications (OpenDocument) v1.0
An open file format is licensed with an open license. [3] [4] [failed verification] [contradictory] For example, an open format can be implemented by both proprietary and free and open-source software, using the typical software licenses used by each. In contrast to open file formats, closed file formats are considered trade secrets.