added group type spec

src/de/unibremen/informatik/hets/model/Group.java

@@ -0,0 +1,17 @@
+package de.unibremen.informatik.hets.model;
+
+import org.semanticweb.owlapi.model.OWLOntologyManager;
+
+public class Group extends Spec {
+    public Group(String cont, String anno) {
+        super(cont, anno);
+    }
+
+    public String toString(OWLOntologyManager ontologymanager) {
+        return content;
+    }
+
+    public String toString() {
+        return content;
+    }
+}

src/de/unibremen/informatik/hets/model/PPXMLParser.java

@@ -100,8 +100,10 @@ public class PPXMLParser {
             return new Basicspec(getrange(hetfile, spec.getAttribute("range")), annotation);
         } else if (spec.getTagName() == "Actuals") {
             return new Actuals(spec.getAttribute("name"), annotation);
+        } else if (spec.getTagName() == "Group") {
+            return new Group(getrange(hetfile, spec.getAttribute("range")), annotation);
         } else {
-            throw new PPXMLParserException();
+            throw new PPXMLParserException("don't know how to handle: " + spec.getTagName());
         }
     }