- From: Hammond, Tony <T.Hammond@nature.com>
- Date: Tue, 4 Oct 2005 09:50:04 +0100
- To: 'Joshua Tauberer' <tauberer@for.net>, 'SWIG' <semantic-web@w3.org>
Hi Joshua: Looks to be an excelent introduction to RDF. I will look forward to reading it. One thing you may want to change, though, throughout is your use of 'urn:' URIs. The '/' character is specifically reserved in 'urn:' syntax - see extract below from RFC 2141. That is, '/' in URI syntax is a hierarchy delimiter and hierarchy is not expressed as such in 'urn:' URIs. Also the construct 'urn://global/name/own' would make 'global' a network authority. 'urn:' does not express network authorities, but rather URN namespaces, e.g. urn:isbn:0671534645 Cheers, Tony ### 2.3 Reserved characters The remaining character set left to be discussed above is the reserved character set, which contains various characters reserved from normal use. The reserved character set follows, with a discussion on the specifics of why each character is reserved. The reserved character set is: <reserved> ::= '%" | "/" | "?" | "#" ### > -----Original Message----- > From: semantic-web-request@w3.org > [mailto:semantic-web-request@w3.org] On Behalf Of Joshua Tauberer > Sent: 03 October 2005 23:23 > To: 'SWIG' > Subject: New Intro to RDF > > > > Hi, > > As probably everyone on the list knows, there's a lot of negative > opinions of RDF out there, and it seems like some of this > stems from a > confusion of RDF the XML format and RDF the general method for > expressing knowledge. But, I haven't come across a deep > explanation of > what RDF-the-method is that we can point people to so they > know there's > more to RDF than the serialization format. > > I know such a document may very well exist, but I figured I > would take a > stab at writing one myself. (If it has no value for anyone else, at > least I gained a deeper understand of RDF by writing it :-). What I > wrote is posted at: > > http://taubz.for.net/code/semweb/whatisrdf/ > > The goal was to introduce RDF from the beginning, show why > it's useful > for modeling knowledge in a distributed way, and to give a basic > presentation of RDFS and OWL. > > It's long for an introduction as I tried to be as explicit as > possible > about what defines RDF (at least in my understanding of RDF). > A shorter > to-the-point version could be synthesized from this. > > Comments welcome, especially if you think it was worth the > time writing. :) > > -- > - Joshua Tauberer > > http://taubz.for.net > > ** Nothing Unreal Exists ** > > ******************************************************************************** DISCLAIMER: This e-mail is confidential and should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage mechanism. Neither Macmillan Publishers Limited nor any of its agents accept liability for any statements made which are clearly the sender's own and not expressly made on behalf of Macmillan Publishers Limited or one of its agents. Please note that neither Macmillan Publishers Limited nor any of its agents accept any responsibility for viruses that may be contained in this e-mail or its attachments and it is your responsibility to scan the e-mail and attachments (if any). No contracts may be concluded on behalf of Macmillan Publishers Limited or its agents by means of e-mail communication. Macmillan Publishers Limited Registered in England and Wales with registered number 785998 Registered Office Brunel Road, Houndmills, Basingstoke RG21 6XS ********************************************************************************
Received on Tuesday, 4 October 2005 08:50:43 UTC