+ * <p>
+ * If set to <code>true</code>, the execution is skipped.
+ * <p>
+ * A skipped excecution is signaled via the maven-property
+ * <code>${hibernate.export.skipped}</code>.
+ * <p>
+ * The excecution is skipped automatically, if no modified or newly added
+ * annotated classes are found and the dialect was not changed.