RE: Enhydra 3.1 and Xerces 1.3.1

Hi Tom,

Enhydra 5.0 uses xerces 1.4.4.  I'm not sure, but this may possibly allow FOP 
to work.  I am using 5.0 with iText (JasperReports) and can produce PDF files 
without problems. I've never worked with FOP though.

The xerces patches are related to XMLC.  Try posting to the xmlc group for more 
information.  There is also  new push to refactor xmlc to use xerces 2.

Xerces is a problem for many apps and app servers.  Even without any patching 
xerces appears to break compatiblity from one release to the next. It's not 
just a problem for Enhydra, but also Tomcat, Weblogic and probably others. I 
think an implementation of the DOM api is now even built into jdk1.4. It seems 
to me, that the api keeps changing and is not very backward compatible.

Mike.


-----Original Message-----
From: Tom Gates [mailto:tgates@xxxxxxxxxxx]
Sent: Thursday, November 07, 2002 6:09 AM
To: enhydra@xxxxxxxxxxx
Subject: Enhydra: Enhydra 3.1 and Xerces 1.3.1


I have an Enhydra 3.1 application that that is using FOP.  The version
of FOP that I am using is dependent on Xerces-J 1.3.1.  Enhydra 3.1 also
has its own built-in copy Xerces-J, but that version is a customized
version of Xerces-J 1.2.0.  Xerces-J 1.3.1 does not contain any of the
Enhydra specific customizations.

Question 1: How can I work around the Xerces version problem?  I
downloaded sources for Xerces-J 1.2.0 and Xerces-J 1.3.1 and did a
three-way analysis of the changes made in each version.   There were a
significant number of differences between 1.2.0 and 1.3.1 such that it
will be very hard to patch in the Enhydra specific changes?  

Question 2: Xerces seems like a popular package that is used by several
other tools and technologies.  What did the Enhdyra developers choose to
make a customized version of Xerces?   Doing so makes it hard for
developers to mix Enhydra with other 3rd-party tools and technologies
that also use Xerces.

-tom

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