Need help with ApplyXPathDOM 2003-04-07 - By Susan Barretta
There was a problem in my xpath expression. /foo:doc/name should be
/foo:doc/foo:name , however fixing that was not sufficient.
I upgraded to Xalan 2.5 D1, and that helped. In other words,
ApplyXPathDOM, with NO code modifications, under Xalan 2.5 D1, with the file
<?xml version="1.0"?>
<foo:doc xmlns:foo="http://foo.org">
<foo:name first="David" last="Marston"/>
<foo:name first="David" last="Bertoni"/>
<foo:name first="Donald" last="Leslie"/>
<foo:name first="Emily" last="Farmer"/>
<foo:name first="Joseph" last="Kesselman"/>
<foo:name first="Myriam" last="Midy"/>
<foo:name first="Paul" last="Dick"/>
<foo:name first="Stephen" last="Auriemma"/>
<foo:name first="Scott" last="Boag"/>
<foo:name first="Shane" last="Curcuru"/>
</foo:doc>
and the invocation java ApplyXPathDOM fooprefix.xml
/foo:doc/foo:name[@(protected)='David']
WORKS.
But when I tried complicating things a bit, I still get errors.
-- fooprefix.xml --
<?xml version="1.0"?>
<foo:doc xmlns:foo="http://foo.org">
<in:section name="ls" xmlns:in="http://junky.com">
<in:index id="crud">
<ls:names xmlns:ls="http://namesls.org">
<ls:name first="David" last="Marston"/>
<ls:name first="David" last="Bertoni"/>
<ls:name first="Donald" last="Leslie"/>
<ls:name first="Emily" last="Farmer"/>
<ls:name first="Joseph" last="Kesselman"/>
<ls:name first="Myriam" last="Midy"/>
<ls:name first="Paul" last="Dick"/>
<ls:name first="Stephen" last="Auriemma"/>
<ls:name first="Scott" last="Boag"/>
<ls:name first="Shane" last="Curcuru"/>
</ls:names>
</in:index>
</in:section>
</foo:doc>
Now when I try running:
java ApplyXPathDOM fooprefix.xml /foo:doc/in:section[@(protected)='ls']
I still get
Exception in thread "main" org.w3c.dom.DOMException: Prefix must resolve to
a namespace: in
at
org.apache.xpath.domapi.XPathEvaluatorImpl.createExpression(XPathEval
uatorImpl.java:210)
ONE way to get around this is to put all my namespace xmlns attributes into
the top node - then it runs through.
We are not too happy with this solution either!
And more strange things:
-- The DOMException from the xpath expression below says: Prefix must
resolve to namespace: in
/foo:doc/in:section[@(protected)="ls"]
-- I thought maybe I should put in a predicate in for the namespace, so I
tried a few possibilities:
/foo:doc/in:section[@(protected)='ls'][@(protected):in='http://junky.com']
and still get the same error.
I tried moving the xmlns:in predicate "up" to foo:doc, like this:
/foo:doc[@(protected):in="http://junky.com"]/in:section[@(protected)='ls']
When there are single quotes around http://junky.com,
I get the same error about the namespace : in , but when I put double
quotes around http://junky.com , I get
Exception in thread "main" org.w3c.dom.DOMException: Prefix must resolve to
a namespace: http
which I thought was really strange.
So what is the correct way to xpath through namespaces?
Thanks for helping!
-- Susan
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