What is xlsx?

The XLSX is a file type from Microsoft and is used for the program Excel. It’s a Open XML format spreadsheet which is a combination of XML and ZIP compression to reduce the file size of Excel documents. MIME TYPEe: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

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What is pml?

A PML extension is used for multiple document files. For instance Portable Application Description (PAD) generates PML files which help authors to provide descriptions and specifications to online destinations in a standard format. An other use of PML files is as Palm Markup Language, which is similar to HTML, and is basically a plain text file that is used to create a web page.

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