Hmm.. Which book would you recommend me to read? Jon On Sep 24, 2011 7:55 PM, "Thad Guidry [via Neo4j Community Discussions]" < ml-node+s438527n3364798...@n3.nabble.com> wrote: > > > Quite wrong. > > IS_JANITOR_OF will stick you into a boxed node ordinal. > What you really want when modeling the world is to only capture the > "semantic relationships" themselves. IS_A being a core semantic > relationship. I am a janitor. He IS_A janitor. What is a janitor ? What > properties does a janitor have ? Does a janitor always have those > properties, no matter it's state ? Does a janitor that LIVES_AT the > Seychelles Islands always have a pail and mop ? > > When trying to model "the world", you must break down to the lowest of lows. > And then use Types to clearly designate Property Reasonings. > > For instance, SWRC ontology says that Bioinformatics IS_A subtopic of > KnowledgeWeb Applications. > > <p2:subTopic> > <p1:ResearchTopic rdf:about=" > https://wiki-sop.inria.fr/wiki/bin/view/Acacia/KnowledgeWeb#Bioinformatics "> > <p2:isSubTopicOf rdf:resource=" > https://wiki-sop.inria.fr/wiki/bin/view/Acacia/KnowledgeWeb#Applications "/> > <p2:topicNumber rdf:datatype="http://www.w3.org/2001/XMLSchema#string ">2.7.3 > </p2:topicNumber> > </p1:ResearchTopic> > </p2:subTopic> > > Great for them. But WHAT is Bioinformatics to the rest of "the world", > generally ? Is it a FIELD_OF_STUDY as Freebase.com says ? Is it a > STUDY_SUBJECT as other Vocabularies describe ? Is a FIELD_OF_STUDY the same > as a STUDY_SUBJECT ? Or is it more proper and correct to say that a > FIELD_OF_STUDY can be PART_OF a STUDY_SUBJECT ? Bioinformatics PART_OF > Biology PART_OF Science ? I would say both and all. And there you would > need many "semantic relationships", depending again on the domains' usage. > > In Freebase, we decided early on that the lowest of lows would be TOPICS. > Some TOPICS could be given Types. A Janitor is a Type of Person. Oh > Really ? No. Not always to some ! But all domains typically agree that a > Janitor is a Profession. A Job_Type (TypeOfJob) that someone professes or > agrees to WORK_AS for payment. And some folks might be enslaved to WORK_AS > :) > > Existing Ontologies and Vocabularies (which are domain based, some wider > than others) can help anyone trying to model "the world". However, be aware > that many longtail domains, like Food Service, or Laser Etching, are simply > not modeled, no one has touched those yet in building ontologies or > vocabularies and henceforth, require community domain experts (the folks in > those businesses or scientific or government communities) to help you think > correctly within their domains, rather than how "the rest of world" would > typically organize them. Organizing across *domains* with Types will > require Namespaces for those domains, and in some cases, you will find that > only a FEW Properties really apply to a specific Namespace. They are just > simply NOT used by the rest of "the world". > > The very last part for you in modeling "the world" should be at a CONCEPT > level. Like SKOS_CONCEPT. Only once you have seen the overlap of a CONCEPT > across domains, can you then begin to give the answer, YES, when 2 or 3 > domains ask, "Is this CONCEPT_OF "Janitor - a profession type where someone > cleans" the SAME_AS ours and RELATED_TO the CONCEPT_OF "Maid" ? > > Proper "semantic relationships" have to allow flexibility across domains. > Find some common overlapping Types and Topics across Domains, and then > begin your experimentation there (and make sure you get a bit of History or > Historical Types in there as well to account for Time Space associations - > those always screw with my head personally, lol). You will soon begin to > see that Domains are really like "Photoshop layers". > > -- > -Thad > http://www.freebase.com/view/en/thad_guidry > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > > > _______________________________________________ > If you reply to this email, your message will be added to the discussion below: > http://neo4j-community-discussions.438527.n3.nabble.com/Modelling-with-neo4j-tp3363823p3364798.html > > To unsubscribe from Modelling with neo4j, visit http://neo4j-community-discussions.438527.n3.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=3363823&code=bG9sZHJ1cEBnbWFpbC5jb218MzM2MzgyM3wtODU1NTY5ODYz
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