xerces.jar vs. xercesImpl.jar

["Pascale, Peter H." <Pe...@pearson.com>]

I am surprised to find that axis seems to require a specific parser -
xerces, and will not accept xercesImpl. I thought both would be JAXP 1.1
compliant parsers, as the set-up instructions describe:


"In the WEB-INF directory, you'll find a "lib" directory.  

In this directory, copy the jars associated with the JAXP 1.1 XML compliant
parser of your choice. We recommend xerces jars from the xml-xerces
distribution, though others work."

When I try to compile wsdl or run an axis client with xercesImpl.jar in the
classpath instead of xerces.jar, I get:

     [java] java.lang.NoClassDefFoundError: org/w3c/dom/Node

Any ideas why this incompatibility exists?

Peter

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Re: xerces.jar vs. xercesImpl.jar

[Steve Loughran <st...@iseran.com>]

----- Original Message -----
From: "Pascale, Peter H." <Pe...@pearson.com>
To: <ax...@ws.apache.org>
Sent: Thursday, March 13, 2003 11:16
Subject: xerces.jar vs. xercesImpl.jar


> I am surprised to find that axis seems to require a specific parser -
> xerces, and will not accept xercesImpl. I thought both would be JAXP 1.1
> compliant parsers, as the set-up instructions describe:

It does not require a specific parser, merely recommends ones that work.
Lots of them seem to have problems with complex XML Schema. Xerces is the
one that Axis is primarily tested against; crimson, caucho and the oracle
one all have caused problems in the past.

So the issue is not JAXP1.1 compliance, as compliance with the XML and XSD
specificiations.

>
>
> "In the WEB-INF directory, you'll find a "lib" directory.
>
> In this directory, copy the jars associated with the JAXP 1.1 XML
compliant
> parser of your choice. We recommend xerces jars from the xml-xerces
> distribution, though others work."

see: a recommendation, not a requirement.

>
> When I try to compile wsdl or run an axis client with xercesImpl.jar in
the
> classpath instead of xerces.jar, I get:
>
>      [java] java.lang.NoClassDefFoundError: org/w3c/dom/Node
>
> Any ideas why this incompatibility exists?

You have multiple implementations of XML parsers in your classpath