RE: Multiple IDs

> So Michael, what does the id() function do in the case stated 
> by Elliotte?
> You didn't comment on that

Actually I drafted a comment mentioning that the prose was typical of James
Clark: he states the bare essentials, and leaves the reader to draw the
necessary inferences. But then I thought the comment might appear insulting,
so I deleted it.

If the second element is treated as not having a unique ID, the inference is
that the id() function will return only the first element.

Michael Kay
http://www.saxonica.com/

> 
> "If an XML processor reports two elements in a document as 
> having the same
> unique ID (which is possible only if the document is invalid) then the
> second element in document order must be treated as not 
> having a unique ID."
> 
> Michael Kay
> http://www.saxonica.com/
> 
> 
>  
> 
> > -----Original Message-----
> > From: Elliotte Harold [mailto:elharo@xxxxxxxxxxxxxxx]
> > Sent: 10 January 2005 19:20
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject:  Multiple IDs
> > 
> > I could swear this came up somewhere recently, but right 
> now I can't 
> > find it. In XPath 1.0, what does the id() function do if there are 
> > multiple elements in the document with the specified ID? (This is 
> > possible, even though invalid.) Should it:
> > 
> > 1. Report an error?
> > 2. Return the first one in document order?
> > 3. Return a node-set containing all of them?
> > 4. Something else?
> > 
> > 
> > --
> > Elliotte Rusty Harold  elharo@xxxxxxxxxxxxxxx XML in a Nutshell 3rd 
> > Edition Just Published!
> > http://www.cafeconleche.org/books/xian3/
> > http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/
> > ref=nosim