Most of them are not presenting real multimedia information now. Bill Thompsons royal family data base does not contain portraits and biographs but has a huge set of information about British, English and Scotish nobility. In difference to these English oriented systems, WW-Person is multilingual. This not true at present in relation to the biographs. They are in German only.
Many users insist on English forms.
Information as it is presented by the royal family data base or by WW-Person was in earlier times printed as catalog of souverains or as lineage book. The problem with these collections was, that they offered the same data distributed at many places and not always consistent. They could not manage the problem of information update - a book of this kind cannot be sold each year. Either souverain catalog, or Ahnentafel of a house, or biographical encyclopedia. The basic technology has proved successful as far as person directed information retrieval and presentation is considered.