code: public ElementDefinitionDt addMapping(Mapping theValue) {
  		if (theValue == null) {
  			throw new NullPointerException("theValue must not be null");
  		}
  		getMapping().add(theValue);
  		return this;
  	}
docs: Adds a given new value for <b>mapping</b> ()
  
  <p>
  <b>Definition:</b>
  Identifies a concept from an external specification that roughly corresponds to this element
  </p>
  @param theValue The mapping to add (must not be <code>null</code>)