Hi,
I'm not having much success executing XPath queries against documents with
a default namespace declared (using the beta4 release). According to the
XML:DB spec, if the prefix input to the setNamespace() method is null or
empty, the default namespace is set.
e.g.
. . .
XPathQueryService service =
(XPathQueryService) col.getService("XPathQueryService", "1.0");
service.setNamespace( null, defaultNamespaceURI );
. . .
But the query comes up empty having set the namespaces as follows (see
examples 1 and 2 below):
service.setNamespace( "", http://www.w3.org/2001/XMLSchema );
service.setNamespace( "xsd", "http://www.w3.org/2001/XMLSchema"; );
Example 1--this works (returns the matching type definition)
============================================================
String xpath = "/xsd:schema/xsd:[EMAIL PROTECTED]'FooType']";
where this schema is in the target collection:
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.foo.net/bar";
xmlns:bar="http://www.foo.net/bar";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
<xsd:element name="Foo" type="bar:FooType" />
<xsd:complexType name="FooType">
<xsd:sequence>
<xsd:element name="alpha" type="xsd:string" />
</xsd:sequence>
<xsd:attribute name="id" type="xsd:ID" use="optional"/>
</xsd:complexType>
</xsd:schema>
Example 2--this doesn't work (empty result set)
===============================================
String xpath = "/schema/[EMAIL PROTECTED]'FooType']";
where this equivalent schema is also in the target collection:
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.foo.net/bar";
xmlns:bar="http://www.foo.net/bar";
xmlns="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified">
<element name="Foo" type="bar:FooType" />
<complexType name="FooType">
<sequence>
<element name="alpha" type="string" />
</sequence>
<attribute name="id" type="ID" use="optional"/>
</complexType>
</schema>
Any suggestions, anyone?
- richard
