[
Lists Home |
Date Index |
Thread Index
]
Thanks Tom,
I tried it with the changes you proposed. My XML-IDE says the file
is valid (as it did before) but Xerces (Release 2.0.1 and 2.0.2) still
returns 'null' after method call getElementById( "abc123" ).
Due to the change of the attributes' datatype in the Schema I had to change
the id-values in the XML file, too. However, here the changed
files again.
The XML-File:
-------------
<?xml version="1.0" encoding="UTF-8"?>
<katalog xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:noNamespaceSchemaLocation="katalog.xsd">
<book id="abc123">
<author>Steven King</author>
</book>
<book id="abc124">
<author>Tom Clancy</author>
</book>
</katalog>
The XML Schema:
---------------
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
<xs:element name="katalog">
<xs:complexType>
<xs:sequence>
<xs:element name="book" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="author" type="xs:string"/>
</xs:sequence>
<xs:attribute name="id" type="xs:ID" use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
<xs:key name="schluessel">
<xs:selector xpath=".//book"/>
<xs:field xpath="@id"/>
</xs:key>
</xs:element>
</xs:schema>
H.-Gerd
-----Ursprüngliche Nachricht-----
Von: Thomas B. Passin [mailto:tpassin@comcast.net]
Gesendet: Dienstag, 27. August 2002 14:35
An: xml-dev@lists.xml.org
Betreff: Re: [xml-dev] How to implement getElementById() with Xerces
using XMLSchema?
[H.-Gerd Rosarius]
> If I use a DTD to specify my id-attribute and assign it to my
> XML file, getElementByID() returns an object of type Element.
> If I use a XML Schema I get 'null' instead.
>
It does not work because you have not declared your "id" attribute to be of
type ID. Type NMTOKEN is NOT the same as type ID (although the lexical
rules are the same). So use xs:ID. Fix this declaration:
<xs:attribute name="id" type="xs:NMTOKEN" use="required"/>
Cheers,
Tom P
> The XML Schema:
> ---------------
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified">
> <xs:element name="katalog">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="book" maxOccurs="unbounded">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="author" type="xs:string"/>
> </xs:sequence>
> <xs:attribute name="id" type="xs:NMTOKEN" use="required"/>
> </xs:complexType>
> </xs:element>
> </xs:sequence>
> </xs:complexType>
> <xs:key name="schluessel">
> <xs:selector xpath=".//book"/>
> <xs:field xpath="@id"/>
> </xs:key>
> </xs:element>
> </xs:schema>
|
