I apologize, but I am still curious to see a legal (and if possible
meaningful) XPath expression that involves xs:error.
I tried this in BaseX and it works, but it seems totally wrong to me
-- returning a type! And from the explanations about xs:error, it
would be an error to use it as a constructor.
let $v := 3
return
if($v eq 2) then xs:error
else $v
On Sat, Apr 19, 2014 at 3:55 PM, Dimitre Novatchev
<dnovatchev(_at_)gmail(_dot_)com> wrote:
On Sat, Apr 19, 2014 at 3:45 PM, Michael Kay <mike(_at_)saxonica(_dot_)com>
wrote:
By way of background to this, it was realised at a fairly late stage that if
all built-in types from XSD 1.1
were to be supported in XPath 3.0, then this included xs:error and t would
be a good idea
to say something about how xs:error should behave; the only alternative was
to specifically exclude it.
Everything the specs say about xs:error is a consequence of the fact that
(a) xs:error is a built-in type,
and (b) it is defined as a union type with no member types. There is no
special treatment of xs:error,
merely explanations of the consequences of its existence and the way it is
defined.
Thank you, Michael,
Is it then a logical conclusion to try to avoid (never use) the
xs:error type in XPath?
Cheers,
Dimitre Novatchev
--
Cheers,
Dimitre Novatchev
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