At 10:46 AM -0400 4/21/08, Dan Russler wrote: >Peter and Vipul...See below...dan > >Kashyap, Vipul wrote: > >> >> >>IMHO, codes don't represent classes in some information model. An >>information model has classes like Observation, whose instances are >>clinical statements made by some entity (person or machine). I >>think information model is "meta" in the sense that its instances >>are statements >>[VK] This the reason I think theHL7 is a meta-model rather than an >>Information Model. Of course this depends on the viewpoint you take >>and the information architecture you adopt. >> ><dan> With apologies to Peter in case I misrepresented your SOA >presentation...Last week, Peter Elkin of Mayo Clinic delivered a >presentation where he called the HL7 RIM a "first order ontology" >because of the abstraction level of the RIM. He called the models >derived from the RIM, e.g. analytic models, patient care document >models like CDA, etc, "second order ontology" because they add a >layer of concreteness to the abstractions of the RIM, i.e. an object >with classCode of observation and moodCode of order becomes an >"observation order object" with neither a classCode nor a moodCode. >Finally, the coding systems themselves support the concreteness of a >"third order ontology." For example, the SNOMED concept becomes an >object itself without a code attribute, moodCode attribute, or >classCode attribute, e.g. a WBC order. /> AAArgh, can I plead that we do NOT use this terminology in this way? The "first/second/higher-order" terminology already has a firmly established and very precise use to refer to types of logic, and hence of ontology languages. Just don't say 'order'. Use some other word, please. Thanks. Pat Hayes -- --------------------------------------------------------------------- IHMC (850)434 8903 or (650)494 3973 home 40 South Alcaniz St. (850)202 4416 office Pensacola (850)202 4440 fax FL 32502 (850)291 0667 cell http://www.ihmc.us/users/phayes phayesAT-SIGNihmc.us http://www.flickr.com/pathayes/collectionsReceived on Thursday, 24 April 2008 14:36:26 GMT
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