I have some doubts about the identifiers. How will we distinguish if monument number 50 is from Nederland or Andorra? Perhaps should it be identified with a prefix (NL-50, AD-50), or perhaps is there any solution in mind?
Moroever, in Spain we can find different formats in different sources: "(R.I.) - 51 - 0010580 - 00000", "R-I-51-0010580", and others. Obviously we need to unify to an unique format and we are discussing it with wm-es, but I would appreciate some inputs. "R.I." or "R-I" stands for Registro de Inmuebles (buildings' register) and "51" is the category for monuments. Probably it is not a good idea to ask participants to type a complicated number format with spaces, zeros, etc. One solution is to reduce it to its numeric form "10580" or perhaps to construct a simplified format like "RI510010580". What are the technical implications about identifiers, and which would be the best approach?
Vicenç