Validation error in generated XSD catalog for DTD files

I installed the "JBoss Tools" plugin, which adds the JavaEE schemas to the old Eclipse XML catalog, and this one is converted to "system-catalog.xml".
When opening this file and the setting "Enable schema based validation" is "Always"...

... there are errors reported for all DTD files:

cvc-pattern-valid: Value '-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN' is not facet-valid with respect to pattern '[a-zA-Z0-9\-'\(\)+,./:=?;!*#@$_%]*' for type 'publicIdentifier'.

It seems the space is missing in the RegEx for CDATA? The attribute "publicIdentifier" is defined as "CDATA" according to "catalog.dtd".

According to "application_1_3.dtd", this is valid:

<!--
This is the XML DTD for the J2EE 1.3 application deployment
descriptor.  All J2EE 1.3 application deployment descriptors
must include a DOCTYPE of the following form:

  <!DOCTYPE application PUBLIC
	"-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN"
	"http://java.sun.com/dtd/application_1_3.dtd">

-->

Untersuchen Sie zunächst das generierte system-catalog.xml zusammen mit catalog.dtd und vergleichen Sie anschließend das Validierungsmuster von publicIdentifier mit dem in application_1_3.dtd gezeigten gültigen Identifier. Reproduzieren Sie die Fehler mit einer auf Always gesetzten schema-basierten Validierung und bestätigen Sie, dass gültige DTD-public identifiers keine Validierungsfehler mehr erzeugen.