Re: [xsl] Finding the ID attribute of an XPath from XMLSchema

["v vijith" <vvijith@xxxxxxxxx>]

Mike
Based on the syntax above, I wrote the code and gives an error,
context document undefined.

declare function id-from-element ( $element as element()? )  as xs:string? {
      data(($element/@*[id(.) is ..])[1])
} ;

let $dm := doc("/repository/content/3001")
let $ee:= id-from-element($dm//figure/picture[1])
return
  <net>
    {$ee}
  </net>

It gives me an error "context document undefined".

the XML is having the struct

<?xml version="1.0" encoding="UTF-8"?>

<sample1 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:noNamespaceSchemaLocation="sample1.xsd">
	<data>Copyright MyCompany 2007</data>
	<figure>
		<picture no="IMAGE-1"/>
		<picture no="IMAGE-2"/>
		<picture no="IMAGE-3"/>
	</figure>
</sample1>

XSD is

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
	<xs:element name="sample1">
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="data"/>
				<xs:element ref="figure"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
	<xs:element name="data" type="xs:string"/>
	<xs:element name="figure">
		<xs:complexType>
			<xs:sequence>
				<xs:element maxOccurs="unbounded" ref="picture"/>
			</xs:sequence>
		</xs:complexType>
		</xs:element>
	<xs:element name="picture">
		<xs:complexType>
			<xs:attribute name="no" use="required" type="xs:ID"/>
		</xs:complexType>
	</xs:element>
</xs:schema>


Thanks
Vijith

On 7/21/07, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> Given a node $n, you can find the value of its ID attribute if it has one
> using
>
> $n/@*[id(.) is $n]
>
> Michael Kay
> http://www.saxonica.com/
>
>
> > -----Original Message-----
> > From: v vijith [mailto:vvijith@xxxxxxxxx]
> > Sent: 21 July 2007 19:16
> > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> > Subject: Re: [xsl] Finding the ID attribute of an XPath from XMLSchema
> >
> > Below is a snippet from the XMLSchema
> >
> > <xs:complexType name="nameType">
> >               <xs:sequence>
> >                       <xs:element minOccurs="0" ref="desig"/>
> >               </xs:sequence>
> >               <xs:attribute ref="dest" use="required"/>
> >               <xs:attribute ref="id"/>
> >               <xs:attribute ref="garageid"/>
> >               <xs:attributeGroup ref="xlink:XLINKATT1"/>
> >       </xs:complexType>
> > <xs:attribute name="id" type="xs:ID"/>
> >
> > this means that in the XML, the nameType node can be
> > identified by the id attribute as xs:attribute name=id is
> > mapped to XS:ID.
> >
> > Likewise there can be many nodes in the XML that has ID
> > associated to it.
> >
> > <xml>
> > <root>
> > <somenode>
> > <nameType id="2" attrib2="34">text</nameType> <nameType
> > id="3" attrib2="34">text</nameType> <nameType id="4"
> > attrib2="34">text</nameType> </somenode> <anothernode
> > attrib5="55"/> </root>
> >
> >
> > In the XML, I perform some kind of XQuery and I get the
> > output as root/somenode/anothernode/nameType.
> > Once I get this node, I should be able to find if there is an
> > ID attribute defined for this node in the XSD.
> > In the above case, the id attribute in the nameType tag is
> > the attribute as per the XML Schema.
> >
> > So I need the output as id for the xpath
> > root/somenode/anothernode/nameType
> >
> > Hope I have explained it better!
> >
> > Well what I thought was this way as a solution 1. Parse the
> > XMLSchema 2. Make a map of XPath as key and the id as attribute.
> > 3. Once I get the xpath from xquery, check the map to find
> > the id 4. But parsing XMLSchema and mapping is not that simple either
> >
> > Thanks
> > Vijith
> >
> > On 7/21/07, Michael Kay <mike@xxxxxxxxxxxx> wrote:
> > > > I have an XML which is associated to an XMLSchema. Once I
> > perform an
> > > > XQuery on the XML I get a selected set of XPaths (Im
> > using our own
> > > > functions).
> > > >
> > > > For each XPath I need to know what is the ID attribute
> > for the XPath.
> > > > I know that in XMLSchema there is an XS:ID Attribute. I
> > would like
> > > > to know if there is a way to find the ID associated from the
> > > > XMLSchema for an XPath in the XML.
> > > >
> > > > Did I confuse everyone?
> > >
> > > You certainly confused me. Show us your source document and tell us
> > > what you want your output to look like.
> > >
> > > Michael Kay
> > > http://www.saxonica.com/