Oxygen XML Forum

Posted: **Sat Sep 25, 2004 1:19 am**

I have no idea what is wrong here. Consider this XML Schema


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

<!-- Copyright P&P Software GmbH (Zurich, Switzerland) -->

<xs:schema 

    targetNamespace="http://www.pnp-software.com/fmt/fm" 

    xmlns:xs="http://www.w3.org/2001/XMLSchema" 

    xmlns:dm="http://www.pnp-software.com/fmt/displayModel" 

    elementFormDefault="qualified" 

    attributeFormDefault="unqualified">

	<xs:element name="FeatureNode">

		<xs:complexType dm:displayType="node">

			<xs:choice>

			    <xs:element name="foo">

			        <xs:complexType>

			            <xs:choice>

			                <xs:element name="bar" type="xs:string"/>

			            </xs:choice>

			        </xs:complexType>

			    </xs:element>

			</xs:choice>

		</xs:complexType>

	</xs:element>

</xs:schema>

If I write this //xs:element[xs:complexType[@*='node']] XPath expression to the XPath "comboBox" it corectly returns /xs:schema[1]/xs:element[1]. However if I change "*" for "dm:displayType" i.e. use the XPath expression //xs:element[xs:complexType[@dm:displayType='node'] Oxygen reports the following: Invalid XPath expression Prefix must resolve to a namespace dm:

Can anyone provide me with some hint?
Thanks a lot!

K!lhor

Posted: **Sat Sep 25, 2004 9:21 am**

Hi,

Oxygen detects only the prefixes used in elements when it evaluates XPath expressions. To workaround this you can add an annotation and use a dummy element from that namespace inside appinfo:

<xs:schema targetNamespace="http://www.pnp-software.com/fmt/fm"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:dm="http://www.pnp-software.com/fmt/displayModel"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:annotation>
<xs:appinfo>
<dm:test/>
</xs:appinfo>
</xs:annotation>
...

Another workaround is to check only the local name:

//xs:element[xs:complexType[@*[local-name()='displayType']='node']]

Best Regards,
George

Oxygen XML Forum

XPath expression -- problem with namespace

XPath expression -- problem with namespace