Why is nodeName sometimes all-caps in javascript DOM?

Posted by harpo on Stack Overflow See other posts from Stack Overflow or by harpo
Published on 2010-03-24T19:12:55Z Indexed on 2010/03/24 19:33 UTC
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JavaScript

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dom

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Xml

So I have a DOM document that looks essentially like this

<categories>
    <category id="1"/>
    <category id="2"/>
</categories>

This is how the document previews in Firebug, as I would expect.

However, when I POST this to the server, I get

<categories>
    <CATEGORY id="1"/>
    <CATEGORY id="2"/>
</categories>

Indeed, doc.documentElement.firstChild.nodeName returns "CATEGORY". The nodes are added using jQuery.append('<category/>').

Why are the child tags returned in all caps?

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