From: Frank van Harmelen ([email protected])
Date: 06/25/02
Richard Fikes wrote: > Here are a couple of query examples for today's discussion. I forward an email that appeared today on the rdf-rules list, outlining an effort to poll resources and experiences on RDF(S) query languages. I think DQL would benefit from seeing how it could be an incremental upgrade over RDF(S) query languages. Frank. ---- -------- Original Message -------- Subject: ANNOUNCEMENT: RDF Query and Rule languages use cases and survey Resent-Date: Tue, 25 Jun 2002 07:25:53 -0400 (EDT) Resent-From: [email protected] Date: Tue, 25 Jun 2002 13:32:21 +0200 From: Alberto Reggiori <[email protected]> Reply-To: [email protected] To: "[email protected]" <[email protected]> CC: "[email protected]" <[email protected]>, "[email protected]" <[email protected]> (apologies for the cross post) Hello everybody, we, that is a group of implementors working on different versions of SquishQL [1], RDQL [2] and other similar RDF query and rule languages, met in Chia for the ISWC2002 at the beginning of June; after a very informal meeting we decided to set up a survey about Use Cases and practical examples about how to query and access remotely RDF databases. Following Andy's announcement a few days ago [3], here is one of the first practical steps in that direction which aims to consolidate and document existing RDF Query and Rule languages and systems. We think that one effective way to have an open and stymulating discussion involving as many people as possible, would be to leverage on what is out there, present what has been already developed in the past years and show what is running today on user's desktops. By sharing ideas, practical use cases and implementations should in fact improve the learning curve of users and RDF software develpers and help them to make better of what they already got and avoid work duplication. It is in our hope that all this will also help the adoption of RDF systems inside exsisting Web infrastructures and to test existing software solutions. Here is a public accessible URL about the survey, which can be directly used to contribute with your own use cases and examples: http://rdfstore.sourceforge.net/2002/06/24/rdf-query/ Even if in the past there have been similar efforts undertaken on this list [4], with this email message we aims to gather together and share a set of query use cases, scenarios and implementations in a kind of database where the actual use of query is scoped out; such a knowledge base can then be analysed to assess the various uses being made of RDF Query and Rule languages in order to get a sense of what is important in RDF applications and what is not. This will also help to address some of the issues in the QL design area and take important software design decisions. Attached are the following files: + The current RDF database as HTML page + the RDF database including an initial set of RDF Query use cases and examples + the RDFS schema Feel free to edit the above RDF file and add your own use cases, scenarios and comments or simply post your contributions to the www-rules list in which case I will provide to integrate your information into the database. Another parallel effort that I have been thinking about, is perhaps to set up a set of test cases for the existing query and rule systems (perhaps based on the RDF Test Cases) that can be used to test and compare the generated query result sets. This should help to validate the results generated by the various systems, assess their differences and help interoperability with existing query and remote access systems. What do you think about it? Do you find it useful? Looking forward to hear about your contributions, comments, suggestions and criticisms about how to improve or doing better :-) Alberto [1] http://swordfish.rdfweb.org/rdfquery/ [2] http://www.hpl.hp.com/semweb/rdql.html [3] http://lists.w3.org/Archives/Public/www-rdf-interest/2002Jun/0202.html [4] http://www.w3.org/2001/11/13-RDF-Query-Rules/
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