code: public void setUUID(String id) {
  		try {
  			this.value = (id != null) ? UUID.fromString(id) : null;
  		} catch (Throwable exception) {
  			assert id != null;
  			this.value = UUID.nameUUIDFromBytes(id.getBytes());
  		}
  		this.type = AttributeType.UUID;
  		this.assigned = this.value != null;
  	}
docs: Set the value of this metadata.
  
  @param id identifier.