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#------------------------------------------------------------------------------ # $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $ # msooxml: file(1) magic for Microsoft Office XML # From: Ralf Brown <ralf.brown@gmail.com> # .docx, .pptx, and .xlsx are XML plus other files inside a ZIP # archive. The first member file is normally "[Content_Types].xml". # Since MSOOXML doesn't have anything like the uncompressed "mimetype" # file of ePub or OpenDocument, we'll have to scan for a filename # which can distinguish between the three types # start by checking for ZIP local file header signature 0 string PK\003\004 # make sure the first file is correct >0x1E string [Content_Types].xml # skip to the second local file header # since some documents include a 520-byte extra field following the file # header, we need to scan for the next header >>(18.l+49) search/2000 PK\003\004 # now skip to the *third* local file header; again, we need to scan due to a # 520-byte extra field following the file header >>>&26 search/1000 PK\003\004 # and check the subdirectory name to determine which type of OOXML # file we have >>>>&26 string word/ Microsoft Word 2007+ !:mime application/msword >>>>&26 string ppt/ Microsoft PowerPoint 2007+ !:mime application/vnd.ms-powerpoint >>>>&26 string xl/ Microsoft Excel 2007+ !:mime application/vnd.ms-excel >>>>&26 default x Microsoft OOXML !:strength +10