- From: Andre Santanche <santanche@ig.com.br>
- Date: Fri, 26 Aug 2005 16:31:55 -0300
- To: public-sws-ig@w3.org
- Cc: Tatiana Vieira <tascvieira@yahoo.com.br>
Tatiana Vieira escreveu: > Hi people, > > As the topic here is namespace, let me ask a question. If a namespace > isn't necessarily an URL (it isn't necessary to be a physical location), > how can anyone discover the concepts declared in an ontology? I mean, > how can I use a specicified vocabulary defined in any place in Web if > I can't find it? > > And, also, how can we be sure that namespaces will not conflict, I mean, > that two diferent users will not put an igual namespace for different > documents? URIs are divided in two categories: URLs and URNs. The URL adoption can be controlled by the URL owner, for example, my lab has an URL: http://www.lis.ic.unicamp.br, and any sub-URL is agreed by the lab members. Additionally, I have a personal URL inside the lab http://www.lis.ic.unicamp.br/~santanch, then I can decide the sub-URLs. However, I prefer the use of URNs that are not restricted to a physical location, and can be directed to any URL you want. There are many URN services. You could, for example, take your own URN for free in http://www.purl.org/. The server guarantees that nobody will take the same URN given to you. > Thank you in advance, > Tatiana. Regards, André Santanchè
Received on Saturday, 27 August 2005 06:01:56 UTC