[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: SemWeb again
Mike Champion wrote: > > As best I understand it, this would be extremely tedious/challenging to address with > SQL or XPath, because the clinical data don't specify "tumors that have the P53 mutation", > they describe things like ?glioblastoma.? One then needs to use SNOMED to infer > that a glioblastoma is a type of astrocytoma (I?m guessing a lot here; forgive me > if I?ve gotten the details wrong, but it?s a GREAT use case!), and then some other > knowledge base to add the bit of information that astrocytomas are characterized by the > P53 mutation. So, I agree: this is not pie in the sky stuff, this is taking > ?real? medical knowledge, encoding it using XML and/or SemWeb technologies, and > performing queries/inferences to answer imporant questions. > > A few questions: > > How close is anyone to actually building a system that contains enough of SNOMED and > the various other bits of knowledge so as to be truly useful to a clinician? there are deployed systems that use SNOMED, but (IMHO) much remains to be done. > > Help me understand the value that RDF and DAML+OIL add to the ?raw? > SNOMED data. Think of DAML+OIL / WebOnt as a language for encoding SNOMED. Particularly a language that allows the encoding to be put on the web and one that allows bits of ontologies written by different groups using different tools to be integrated together -- the tools _already_ emit DAML+OIL. > > This sounds like a very interesting challenge for RDBMS experts; I would guess that > it is too hard for a practical RDBMS-based application, but not being an expert, > I would not want to assume that. Has this class of problems been studied, and > no practical solution using relatively well-understood technologies been found? Description Logic is reasonably well understood -- though admittedly not mainstream. But your analysis is essentially correct -- just try doing something like this with a simple SQL query. > ...Can you imagine this being handled with > XQuery? Can any XPath2/XQuery experts offer an opinion as to whether this kind of > query (sortof a recursive join across three XML collections???) > is within their requirements or use cases? > Depending on how things go, and certainly if I get my druthers, there might be a tight fit between XQuery and the WebOnt language -- I should note that the WebOnt WG archives are open to the public so you can see what everyone is thinking :-) http://www.w3.org/Archives/Public/www-webont-wg also http://www.w3.org/Archives/Public/public-webont-comments if y'all have 'features' that you think would be useful. More on this whole topic later. Jonathan
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