I think from a users perspective it wouldn't hurt to have one. It's like documentation if you know how it works it's not useful. However if you're just trying to learn how it works it can be helpful. :)

On Wed, Jun 7, 2017 at 11:11 AM, David M. Lloyd <david.lloyd@redhat.com> wrote:
Something that has come up in a JIRA issue [1] is the question of
whether the WildFly Client Configuration file should use a schema for
its root element.

The root of the "wildfly-client.xml" file is presently a single,
namespace-less element named "configuration".  The content of this
element is a sequence of library-specific configuration, like this:

<configuration>
     <discovery xmlns="urn:wildfly-discovery:1.0">
         <!-- content here -->
     </discovery>
     <jboss-ejb-client xmlns="urn:jboss:wildfly-client-ejb:3.0">
         <!-- content here -->
     </jboss-ejb-client>
     <!-- etc. -->
<configuration>

The question is, should there be a schema for that root element?  The
entire schema would be something like:

<xs:element name="configuration" type="configuration-type"/>

<xs:complexType name="configuration-type">
     <xs:any maxOccurs="unbounded" namespace="##other"/>
</xs:complexType>

Then you'd have to put the configuration namespace in as well:

<configuration xmlns="urn:wildfly-client:1.0">
     <discovery xmlns="urn:wildfly-discovery:1.0">
         <!-- content here -->
     </discovery>
     <jboss-ejb-client xmlns="urn:jboss:wildfly-client-ejb:3.0">
         <!-- content here -->
     </jboss-ejb-client>
     <!-- etc. -->
</configuration>

WDYT?  Is it worth having a whole schema/namespace for a single element?

[1] https://issues.jboss.org/browse/ELY-1098
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