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">

-->

Inizia esaminando il system-catalog.xml generato insieme a catalog.dtd, quindi confronta il modello di validazione di publicIdentifier con l’identificatore valido mostrato in application_1_3.dtd. Riproduci gli errori con la validazione basata sullo schema impostata su Always e conferma che gli identificatori public validi dei DTD non producano più errori di validazione.