public Description getFunctional()
	{
		Description tRequirements = new Description();
		
		for(Property tProp : this) {
			if(tProp != null) {
				if(!(tProp instanceof NonFunctionalRequirementsProperty)) {
					tRequirements.set(tProp);
				}
			}
		}
		
		return tRequirements;
	}