Re: XPath 2.0 Best Practice: wrap the first node of ev

Hi Roger,
   For this case, some form of static error reporting is already
defined in the XPath 2.0 spec. Please see:

http://www.w3.org/TR/xpath20/#id-schema-element-test

<quote>
schema-element(ElementName)

If the ElementName specified in the SchemaElementTest is not found in
the in-scope element declarations, a static error is raised
[err:XPST0008].
</quote>

But your suggestion to ask for a better error reporting looks good to
me (as implemented by Saxon).


On 3/27/08, Costello, Roger L. <costello@xxxxxxxxx> wrote:
> David Carlisle wrote:
>
> > That seems a fairly harsh statement given that there is absolutely
> nothing
> > in the XSLT specification that suggests that a warning should be
> raised
> > for this expression.
>
> > It may be that you think that the expression should be in error, but
> in
> > that case your complaint should be with the XSLT Working Group who
> > specified it
>
> Thanks David.  You're right.  Okay, I just sent the below message to
> public-qt-comments@xxxxxx
>
> ---------------------------------------------------------
>
> [XPath] Request XPath implementations be required to do some static
> type checking on the schema-element function
>
> Hi Folks,
>
> I would like to request a small change to the XPath 2.0 specification.
>
> I would like to request that XPath implementations be required to
> generate an error or warning message for expressions like this:
>
>    schema-element(Book)/Foo
>
> where Foo is not a valid child of Book, according to the in-scope
> schema.
>
> Further, implementations be required to generate an error or warning
> message for expressions like this:
>
>   schema-element(Book)/Author/FirstNam
>
> where, according to the in-scope schema, Author is a valid child of
> Book but FirstNam (note that I misspelled Name) is not.
>
> Thank you very much for your consideration.
>
>  -- Roger L. Costello


-- 
Regards,
Mukul Gandhi