This is a very simple example of using HTML, XML and DAML to represent information. The HTML markup provides the information in a form that you could read via your Web browser and you would understand perfectly well that the person is an Air Force Captain. The XML representation uses element tags to make each piece of information explicit so that a software application could recognize that the word “Captain” was a rank. In the DAML markup you can see that the rank is identified through reference to a URI at http://www.af.mil/personnel. That URI would contain DAML markup representing an ontology of Air Force ranks and how they relate to one another. If the DAML markup was describing someone in the Navy, it would reference a URI at http://www.navy.mil/personnel and the relative position of Captain in the Navy rank ontology would be quite different.