Quick questions -is it needed to use a dtd definition in the XML source


<!DOCTYPE root [
...
<!ELEMENT item (#PCDATA)> 
<!ATTLIST item id ID #REQUIRED> 
...
]> 

in order for id() to match an element with @id attribute? Do some processor 
just look for the existnace of @id or is an ID definiton needed? Do some 
processors treat this differently (whicyh and how?

final question -what id "id()" called - it isn't a function or is it?
It acts more like text() or comment(). thanxks

----------------
   <xsl:template match="id('x123')"> 
      <xsl:value-of select="."/> 
   </xsl:template> 

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