Functions have "signatures", what do elements have?

Hi Folks,

The XPath 2.0 matches function has this "signature":

    matches(input, regex)

So, functions have "signatures."


Here is the XSLT 2.0 analyze-string element:

   <xsl:analyze-string select="string" regex="regex" flags="flags">
    
What is that? Is it:

   - The "signature" of the analyze-string element? 

   - The "form" of the analyze-string element?

   - Something else?

What is the correct terminology when referring to an XML element?

/Roger