Case conventions on element names?

Question

Are there any formal recommendations on element casing in XML?

I know XHTML uses lowercase element names (as opposed to HTML which canonically uses uppercas

Answer 1

To add to Metro Smurf's answer.

The National Information Exchange Model (NIEM: http://en.wikipedia.org/wiki/National_Information_Exchange_Model) says to use:

• Upper CamelCase (PascalCase) for elements.
• (lower) camelCase for attributes.

The NIEM makes for a good option when you're looking to conform to some standard.