This spec is written very confusing
Selector
|
[1]
|
Selector
|
::=
|
http://www.w3.org/TR/xmlschema-1/#Path#Path ( '|' http://www.w3.org/TR/xmlschema-1/#Path#Path )*
|
|
|
[2]
|
Path
|
::=
|
('.//')? http://www.w3.org/TR/xmlschema-1/#Step#Step ( '/' http://www.w3.org/TR/xmlschema-1/#Step#Step )*
|
|
|
[3]
|
Step
|
::=
|
'.' | http://www.w3.org/TR/xmlschema-1/#NameTest#NameTest
|
|
|
[4]
|
NameTest
|
::=
|
http://www.w3.org/TR/REC-xml-names/#NT-QName
| '*' | http://www.w3.org/TR/REC-xml-names/#NT-NCName ':' '*'
|
|
Field
|
[5]
|
Path
|
::=
|
('.//')? ( http://www.w3.org/TR/xmlschema-1/#Step#Step '/' )* ( http://www.w3.org/TR/xmlschema-1/#Step#Step | '@' http://www.w3.org/TR/xmlschema-1/#NameTest#NameTest )
|
Schema
Component Constraint: Fields Value OK
All of the
following must be true:
1 Each member of the http://www.w3.org/TR/xmlschema-1/#fields#fields
must be a valid XPath expression, as defined in http://www.w3.org/TR/xmlschema-1/#bib-xpath#bib-xpath.
2 One of the following must be true:
2.1 It must conform to the
extended BNF given above for http://www.w3.org/TR/xmlschema-1/#Selector#Selector, with
the following modification:
My interpretation is for field, just change the Path definition that
was used in the Selector definition
So. Field becomes:
|
Field
|
::=
|
http://www.w3.org/TR/xmlschema-1/#Path#Path ( '|' http://www.w3.org/TR/xmlschema-1/#Path#Path)*
|
|
|
[2]
|
Path
|
::=
|
('.//')? ( http://www.w3.org/TR/xmlschema-1/#Step#Step '/' )* ( http://www.w3.org/TR/xmlschema-1/#Step#Step | '@' http://www.w3.org/TR/xmlschema-1/#NameTest#NameTest )
|
|
|
[3]
|
Step
|
::=
|
'.' | http://www.w3.org/TR/xmlschema-1/#NameTest#NameTest
|
|
|
[4]
|
NameTest
|
::=
|
http://www.w3.org/TR/REC-xml-names/#NT-QName
| '*' | http://www.w3.org/TR/REC-xml-names/#NT-NCName ':' '*'
|
|
XMLSpy treats it this way. ( Or so I believe, based on my testing. )
Bill Riegel
LandMark Graphics
713-839-3388
-----Original Message-----
From: Chiusano Joseph [mailto:chiusano_joseph@b...]
Sent: Tuesday, May 20, 2003 12:44 PM
To: Murali Mani
Cc: Jeff Lowery; 'Bill Riegel'; 'xml-dev@l...'
Subject: Re: having problems with the "|" in field's
element in the xs:key el ement
Oh, I see now - please disregard my last e-mail. Thanks for putting me
on the "path" to enlightenment. :)
Murali Mani wrote:
>
> that is correct, if you see
> http://www.w3.org/TR/xmlschema-1/#coss-identity-constraint
>
> it says selector can include |, but field cannot include |. This
is to be
> expected, right?, from what is the general principle: any path
expression
> in the field should return one and exactly one value.
>
> cheers and regards - murali.
>
> On Tue, 20 May 2003, Jeff Lowery wrote:
>
> > Not for the field XPaths. If the OR's not in single quotes ('|'),
then it's
> > part of the BNF grammar, not part of the XPath grammer.
> >
> > > -----Original Message-----
> > > From: Bill Riegel [mailto:BRiegel@l...]
> >
> > > This list the "|" has a valid option.
> >
> >
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