690 Microsoft Word Document 97-2003 Microsoft Word for Windows Document (97-XP) Word Processor None With the release of Word 97, Microsoft revised the native binary word processing format, which is based on its generic OLE2 Compound Document Format. The format is proprietary and Microsoft does not make details of its structure public. The information here is derived primarily from OpenOffice.org's reverse-engineered documentation of the format and should not therefore be regarded as definitive. A Word document is stored as a ‘WordDocument’ stream within a Compound Document Format file. The format remained unchanged with the releases of Word 2000, 2002 and 2003. An alternative extension of .wbk refers to a backup file of a Word document, however there is no material or structural difference between a .wbk file and the .doc file it is a backup of. Binary Little-endian (Intel) 1 Archives New Zealand / Archives New Zealand 11 Mar 2005 This format can be identified via a container signature in DROID version 6 or later. The PRONOM database cannot currently represent container signatures. 19 Apr 2012 application/msword MIME com.microsoft.word.doc Apple Uniform Type Identifier fmt/40 PUID doc File extension wbk File extension 182 Microsoft Word for Windows 97 - 2002 Compound document header + WordDocument user stream + version number 1 Absolute from BOF 0 D0CF11E0A1B11AE1{20}FEFF 1 Variable 57006F007200640044006F00630075006D0065006E007400{42}02(00|01) 1 Variable 4D6963726F736F667420576F7264(20382E30|20392E30|2031302E30|2D446F6B756D656E74) Has lower priority than 76 Microsoft Word Document Template Has lower priority than 1553 Microsoft Word Document (Password Protected) Has lower priority than 1554 Microsoft Word Document Template (Password Protected) Has priority over 767 OLE2 Compound Document Format Has priority over 1401 Microsoft Word (Generic) Is subsequent version of 688 Microsoft Word Document Is subtype of 767 OLE2 Compound Document Format