On 24/03/2014 18:31, Bill Haskett wrote:
I'm not using 2013. A friend was showing me that the new word and excel files were nothing but XML inside a zip file. So, open a ".xlsx" or ".docx" file with a zip client and you can actually see its contents. Kind of amazing.

Copying free software ... I'm not sure how long this has been in the Open Document formats, but it's quite a while. Mind you, I didn't know that MS's documents were zip archives - I knew it was true of Libreoffice et al.

Libreoffice and its predecessors like to trumpet that they are great tools for recovering corrupt MS documents - bit embarrasing for them that I have had to - on one occasion - use Excel to recover a corrupt OOo spreadsheet! I split open the zip document, retrieved the xml, and tried to read it back into calc. Could I heck! It refused to recognise it and even when I tried to force calc to open it it passed it over to writer. Finally I had to open it in Excel, save it as an xls, and import it back into calc.

Cheers,
Wol
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