Re: [xml-dev] Inconsistent expansion of {} inside strings ...

[David Carlisle <davidc@nag.co.uk>]

On 10/05/2010 15:28, David wrote:
 > I ran into this today and it surprised me.  I'm sure this is "as
 > documented" but was wondering if anyone could provide a rationale ?
 >
 > {} expansion occurs within strings in attributes but not in "plain 
strings"

You didn't say, but you're asking about xquery syntax.


in xslt (where the notation comes from) the rationale is that {} is 
never a special character in Xpath, it is just used to trigger xpath 
evaluation in certain contexts, (notably attribute values of literal 
result elements).

In Xquery, where of course {} is a special character the rationale has 
to be reworded slightly but is essentially the same, allowing xquery 
evaluation within a string literal would complicate things with no extra 
functionality as you can always just use concat if you need to construct 
a string.

David


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