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Posts Tagged ‘Open XML’

Open XML is Clever!

When I started using Office 2007, it was a nice surprise to find that when I saved my docs as .docx, it actually occupied less space than a corresponding .doc. I expected it to be the other way round since the old formats were binary whereas the new formats are xml based.

I finally figured out why. A docx (or xlsx or any other office file) is actually a zip file. You can go change the extension to .zip and look at the contents. Pretty clever! Not only because it saves space but it enables a number of other scenarios.

Here’s a good read on it:-

http://msdn2.microsoft.com/en-us/library/aa338205.aspx#office2007aboutnewfileformat_introduction

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