Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/DoubleValue.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/DoubleValue.java	(revision 668154)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/DoubleValue.java	(working copy)
@@ -66,7 +66,7 @@
         try {
             return new DoubleValue(Double.parseDouble(s));
         } catch (NumberFormatException e) {
-            throw new ValueFormatException("invalid format", e);
+            throw new ValueFormatException("not a valid double format: " + s, e);
         }
     }
 
Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/PathValue.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/PathValue.java	(revision 668154)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/PathValue.java	(working copy)
@@ -57,7 +57,7 @@
             }
             return new PathValue(s);
         } else {
-            throw new ValueFormatException("not a valid path format");
+            throw new ValueFormatException("not a valid path format: " + s);
         }
     }
 
Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/ReferenceValue.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/ReferenceValue.java	(revision 668154)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/ReferenceValue.java	(working copy)
@@ -71,11 +71,11 @@
             try {
                 UUID.fromString(s);
             } catch (IllegalArgumentException iae) {
-                throw new ValueFormatException("not a valid UUID format");
+                throw new ValueFormatException("not a valid UUID format: " + s);
             }
             return new ReferenceValue(s);
         } else {
-            throw new ValueFormatException("not a valid UUID format");
+            throw new ValueFormatException("not a valid UUID format: " + s);
         }
     }
 
Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/LongValue.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/LongValue.java	(revision 668154)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/LongValue.java	(working copy)
@@ -66,7 +66,7 @@
         try {
             return new LongValue(Long.parseLong(s));
         } catch (NumberFormatException e) {
-            throw new ValueFormatException("invalid format", e);
+            throw new ValueFormatException("not a valid long format: " + s, e);
         }
     }
 
Index: jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/NameValue.java
===================================================================
--- jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/NameValue.java	(revision 668154)
+++ jackrabbit-jcr-commons/src/main/java/org/apache/jackrabbit/value/NameValue.java	(working copy)
@@ -81,7 +81,7 @@
             }
             return new NameValue(s);
         } else {
-            throw new ValueFormatException("not a valid name format");
+            throw new ValueFormatException("not a valid name format: " + s);
         }
     }