private ExpertiseDefinition baseDef()
								{
									if(ref == null)
										return null;
									ExpertiseDefinition curDef = ref.get();
									if(curDef == null)
									{
										curDef = CMLib.expertises().findDefinition(ID, true); 
										if(curDef==null)
										{
											ref = null;
										}
										else
											ref = new WeakReference<ExpertiseDefinition>(curDef);
									}
									return curDef;
								}