A No-nonsense Guide to Semantic Web Specs for XML People "I was going to talk about RDQL in this article, but on Oct. 12, the Data Access Working Group (DAWG, pronounced so that it rhyms with 'dog') released the first working draft of Sparql, the query language for RDF."
"So, as a result, the query will return the title and the price of items where the price is less than 30.
Big deal, I hear you saying. I can do that today in SQL.
True, you can. If your data is local and you control it. But what if you want a software agent to do the queries for you? How are you going to find out across different databases how to adapt your query to their own internal logic, to their tables and to the way thay modeled the information in their relational model?"
"So, in short: should you care about RDF? For now, you are safe if you care about keeping your own data valid and coherent. The semantic web is trying hard to unlock the chicken-egg problem of "no killer app until data, no data until killer app" and automatic trasnformation of existing data into RDF is what I think is going to unlock it. Also, the fact that we are building tools that you can now use to operate on your RDF data, for example to browse and search it, will show you what you can gain by making those relationships explicit."