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Slotted RuleML for Metarole-Based Object-Centered Knowledge Representation

Slotted RuleML for Metarole-Based Object-Centered Knowledge Representation. Harold Boley , NRC IIT e-Business. 2 November 2002 Revised: 26 February 2005. Slotted RuleML Via the Name-Giving Metarole slot (I).

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Slotted RuleML for Metarole-Based Object-Centered Knowledge Representation

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  1. Slotted RuleML forMetarole-Based Object-CenteredKnowledge Representation Harold Boley, NRC IIT e-Business 2 November 2002 Revised: 26 February 2005

  2. Slotted RuleML Via the Name-Giving Metarole slot (I) Here is a self-explaining 'metarole' (slot) representationof the slotted, RDF-like Jess fact (automobile (make Ford) (model Explorer) (year 1999)) in Object-Oriented (OO) RuleML – part of RuleML 0.88 –with user slots named via the first subelement: <Atom> <opr><Rel>automobile</Rel></opr> <slot><Ind>make</Ind><Ind>Ford</Ind></slot> <slot><Ind>model</Ind><Ind>Explorer</Ind></slot> <slot><Ind>year</Ind><Ind>1999</Ind></slot> </Atom> RuleML 0.88

  3. Slotted RuleML Via the Name-Giving Metarole slot (II) This 'Slotted RuleML' notation corresponds to the 'positionalized' ruleml-datalog notation <Atom> <opr><Rel>automobile</Rel></opr> <Ind>Ford</Ind> <Ind>Explorer</Ind> <Ind>1999</Ind> </Atom> if the 'roles' of the make, model, and year positions are remembered somewhere else (signature declaration) RuleML 0.88

  4. Slotted RuleML Via the Name-Giving Metarole slot (III) Note that a mix of an ordered sequence of args androle-unordered args will thus be possible in facts as well: <Atom> <opr><Rel>automobile</Rel></opr> <Ind>Ford</Ind> <Ind>Explorer</Ind> <Ind>1999</Ind> <slot><Ind>mileage</Ind><Ind>65000</Ind></slot> <slot><Ind>color</Ind><Ind>white</Ind></slot> </Atom> Also, Ind elements can be replaced by (typed) Var elements in all of the positional, slotted and mixed notations RuleML 0.88

  5. Flat Feature Terms in Slotted RuleML The minimal 'metarole' (slot) representation of the slotted,RDF-like (untyped) feature term, similar to F-logic term, auto[make -> Ford; model -> Explorer; year -> 1999] in RuleML 0.88 with user slots named via the first subelement: <Cterm> <opc><Ctor>auto</Ctor></opc> <slot><Ind>make</Ind><Ind>Ford</Ind></slot> <slot><Ind>model</Ind><Ind>Explorer</Ind></slot> <slot><Ind>year</Ind><Ind>1999</Ind></slot> </Cterm> Can also be used as an argument in facts RuleML 0.88

  6. Nested Feature Terms in Slotted RuleML The representation of the nested (untyped) feature term vehicle[winter -> auto[make -> Ford; model -> Explorer; year -> 1999] summer -> cycle[make -> Honda; model -> Magna; year -> 2002]] in RuleML 0.88 with user slots named via the first subelement: <Cterm> <opc><Ctor>vehicle</Ctor></opc> <slot><Ind>winter</Ind> <Cterm> <opc><Ctor>auto</Ctor></opc> <slot><Ind>make</Ind><Ind>Ford</Ind></slot> <slot><Ind>model</Ind><Ind>Explorer</Ind></slot> <slot><Ind>year</Ind><Ind>1999</Ind></slot> </Cterm> </slot> <slot><Ind>summer</Ind> <Cterm> <opc><Ctor>cycle</Ctor></opc> <slot><Ind>make</Ind><Ind>Honda</Ind></slot> <slot><Ind>model</Ind><Ind>Magna</Ind></slot> <slot><Ind>year</Ind><Ind>2002</Ind></slot> </Cterm> </slot> </Cterm> RuleML 0.88

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