that was where I was going, but I'm surprised that a function was provided
to track down IDs but not one to pull apart IDREFS, or build that tokenize
functionality into the id() function itself.
It does. The attribute doesn't need to be declared IDREF: any space
separated string is split up automatically:
Xpath 1 says
The id function selects elements by their unique ID (see [5.2.1 Unique
IDs]). When the argument to id is of type node-set, then the result is
the union of the result of applying id to the string-value of each of
the nodes in the argument node-set. When the argument to id is of any
other type, the argument is converted to a string as if by a call to the
string function; the string is split into a whitespace-separated list of
tokens (whitespace is any sequence of characters matching the production
S); the result is a node-set containing the elements in the same
document as the context node that have a unique ID equal to any of the
tokens in the list.
David
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