diff -r 3e43a95fa711 xml.schema.completion/src/org/netbeans/modules/xml/schema/completion/util/CompletionUtil.java
--- a/xml.schema.completion/src/org/netbeans/modules/xml/schema/completion/util/CompletionUtil.java	Tue Mar 30 19:16:55 2010 +0200
+++ b/xml.schema.completion/src/org/netbeans/modules/xml/schema/completion/util/CompletionUtil.java	Tue Mar 30 22:59:56 2010 +0100
@@ -313,14 +313,14 @@
            ((Datatype)type).getEnumerations() == null)
             return null;                
         for(Object value: ((Datatype)type).getEnumerations()) {
+            String str = (value!=null)?value.toString():null;
             if(context.getTypedChars() == null || context.getTypedChars().equals("")) {
-                ValueResultItem item = new ValueResultItem(attr, (String)value, context);
+                ValueResultItem item = new ValueResultItem(attr, str, context);
                 result.add(item);
                 continue;
             }
-            String str = (String)value;
             if(str.startsWith(context.getTypedChars())) {
-                ValueResultItem item = new ValueResultItem(attr, (String)value, context);
+                ValueResultItem item = new ValueResultItem(attr, str, context);
                 result.add(item);
             }
         }
@@ -344,7 +344,7 @@
         }
         // namespace aware items
         List<String> prefixes = getPrefixes(context, axi, cm);
-        if (prefixes.size() == 0) {
+        if (prefixes.isEmpty()) {
            prefixes.add(null);
         }
         for (String prefix: prefixes) {