[jdom-interest] Re: XML Schema Validation

[Larry Davies]

To answer the questions some are having regarding using schemas, the answer is
Yes/No.  As others have mentioned, JDOM does not in and of itself validate
schemas.  The underlying parser (like Xerces) validates the xml document against
a schema.  I recently had some problems getting my XML document to parse and
validate against a schema using JDOM Beta 6.  I got it to work now.  You have to
be using a version of a parser that will validate with schemas.  I used Xerces
version 1.3.0.  FYI, the older version of Xerces 1.2.0 does not work for schema
validation.  To validate the document using JDOM, I believe you must instantiate
the builder as follows: SAXBuilder builder = new SAXBuilder(true).  In addition,
you must have your XML document point to your schema.  The following is a
snippet from my XML document and Schema document.

Schema:
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2000/10/XMLSchema"
        xmlns:cs="http://localhost"
        elementFormDefault="qualified"
        attributeFormDefault="unqualified"
        targetNamespace="http://localhost">

XML document:
<Data xmlns="http://localhost"
      xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
      xsi:schemaLocation="http://localhost mySchema.xsd">

The localhost reference could be your domain name and the mySchema.xsd is the
name for your schema document.  I believe you may also need to tell JDOM
to use the namespace http://localhost.  Not 100% sure on that, but I believe it
did not work for me until I did that.

Anyway, there may be other ways, but this worked fine for me.

Thanks.