For some reason, the workbook, styles and a number of other small parts are also BIN parts despite the fact that those contribute only marginally to the overall processing of the workbook. Those BIN parts are a subset of the XML parts most affected by performance and scalability issues, most noteworthy each worksheet because of its arbitrary size.
Apparently for performance reasons, it was decided to store an Excel file using a number of BIN parts instead of XML parts. PPTX fileīefore I get into further details about these two BIN parts, there are also BIN parts introduced by a new variant of the Excel 2007 file format known as Excel binary workbook which is a file ending with. DOCM fileĪn example of oleObjectxxx.bin when cracking-open a Powerpoint 2007. OLE objects: oleObjectxxx.bin (MIME type: application/)Īn example of vbaProject.bin when cracking-open a Word 2007.VBA macros: vbaProject.bin (MIME type: application/).BIN, that actually contain their own file format depending on the MIME type defined in the relationships part ( xxx.rels) : BIN parts are zip entries consisting of files with extension. If you insert a VBA macro or an OLE object in a Word 2007, Excel 2007 or Powerpoint 2007 document, then there will be one or more BIN parts of interest. BIN parts are of particular interest for the file format consumer or updater since the underlying file formats are undocumented (at the time of writing, August 10 2006) and are several additional file formats to deal with.īIN parts appear in a number of cases. The new Office 2007 file formats are ZIP files that contain parts some of which are XML, some others are native file formats such as JPEG pictures, and the remaining binary parts end up being referred to as BIN parts. Stephane Rodriguez, August 2006 - this document is not endorsed by Microsoft.
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