RE: [xml-dev] Is "XML" an abbreviation or an acronym?

["Costello, Roger L." <costello@mitre.org>]

Hi Mark,

> What is the basis for the question? 

I often use "XML" in XHTML documents. I want to mark it up in the most
correct, semantic-rich way.  

Thus, I would like to know whether "XML" is an abbreviation or an
acronym, and whether it is more accurate to mark it up like this:

    <abbr title="Extensible Markup Language">XML</abbr>
 
 or like this:
 
    <acronym title="Extensible Markup Language">XML</acronym>

/Roger