What does X denotes in ASPX, DOCX, XLSX, PPTX etc?

Posted by Manish on Super User See other posts from Super User or by Manish
Published on 2010-02-03T14:59:46Z Indexed on 2010/06/15 16:23 UTC
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Filed under:

Xml

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terminology

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file-extension

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docx

Previously there were ASP, DOC, XLS, PPT etc and now ASPX, DOCX, XLSX, PPTX respectively.

What does X denotes in ASPX, DOCX, XLSX, PPTX etc?

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