Growth hint -- used in file format identification

[Jirka Kosek]

On 4.11.2014 19:25, Arms, Caroline wrote:
> Just FYI.  The OOXML record in the primary database of file format signatures used by the archival community includes:
> http://apps.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=910&strPageToDisplay=signatures
> which takes advantage of the growth hint bytes actually found in .xslx, .docx, and .pptx (etc.) files to recognize OOXML files from the Zip-based package without unpacking it.

Hi Caroline,

but this signature matches only files produced by MS Office, right?

I sometimes create OOXML files programmatically and ZIP them using some
generic ZIP library. Such files are not matching signatures mentioned above.

				Jirka


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