- From: Patrick Stickler <patrick.stickler@nokia.com>
- Date: Fri, 26 Mar 2004 11:23:26 +0200
- To: "ext Seaborne, Andy" <andy.seaborne@hp.com>
- Cc: RDF Data Access Working Group <public-rdf-dawg@w3.org>
I support this use case. Patrick On Mar 25, 2004, at 22:37, ext Seaborne, Andy wrote: > > > == Task > > A user wants to send an email message to a person whose name is "John > Smith". The user has a personal address book in RDF in a file that > contains > all the information needed. The address book uses the FOAF vocabulary > [1]. > > The user's email client queries their address book and fills in the > result > in the "To:" field, if there is a single match, otherwise it shows > there are > sevaerl options and allows the user to select one. > > == Importance of DAWG > > A query is more efficient in terms of application programmer time than > writing custom code to a lower level interface. The resulting > execution can > be more efficient because an application might choose a simple way of > doing > it where as a toolkit can invest in optimization. > > Applications that use the DAWG rec. can be switched from a local > personal, > address book to a query to an LDAP server which makes its information > available as if it were an RDF graph with no change to the application > other than pointing it to a different source. > > If the query is issued to a remote data source then a way of > serialising one > or more operations requests is needed. A query language is one way of > providing this. > > Information sources that use the DAWG rec. can be accessed by a wider > set of > applications with no extra work. > > == Other > > The query has two parts - locate the resource and extract some > information > from that resource. The presentation of the results is the mailbox > email > address. As people may have several mailboxes, there can be multiple > results even if the conceptual task is to find one. > > The resource for the person could be a bnode or a labelled resource. > > An example query: > > SELECT ?mbox > WHERE > (?x foaf:name "John Smith") > (?x foaf:mbox ?mbox) > USING > foaf FOR <http://xmlns.com/foaf/0.1/> > > ------- > > [1] http://xmlns.com/foaf/0.1/ > FOAF namespace document > > -- Patrick Stickler Nokia, Finland patrick.stickler@nokia.com
Received on Friday, 26 March 2004 04:25:33 UTC