OIL – Simple Standard

• Ontology Inference Layer, year 2000

• DTD

• <?xml version="1.0" encoding="UTF-8"?>

• <!-- DTD for Ontology Integration Language OIL -->

• <!-- version 01 May 2000 -->

• <!ELEMENT oil:ontology (oil:ontology-container, oil:ontology-definitions)>

• <!-- Ontology container -->

• <!ELEMENT oil:ontology-container (rdf:RDF)>

• <!-- This part contains meta-data about the ontology.

• It is formatted according [Miller et al., 1999] -->

• <!ELEMENT rdf:RDF (rdf:Description)>

• <!ATTLIST rdf:RDF

• xmlns:rdf CDATA #FIXED "http://www.w3.org/1999/02/22-rdf-syntax-ns#"

• xmlns:dc CDATA #FIXED "http://purl.oclc.org/dc#"

• xmlns:dcq CDATA #FIXED "http://purl.org/dc/qualifiers/1.0/"

• >

• <!ELEMENT rdf:Description ((dc:Title+, dc:Creator+, dc:Subject*, dc:Description+, dc:Publisher*, dc:Contributor*, dc:Date*, dc:Type+, dc:Format*, dc:Identifier+, dc:Source*, dc:Language+, dc:Relation*, dc:Rights*) | (dcq:descriptionType, rdf:value) | (dcq:relationType, rdf:value))>

• <!ATTLIST rdf:Description

• about CDATA #IMPLIED

• >

• <!ELEMENT dc:Title (#PCDATA)>

• <!ELEMENT dc:Creator (#PCDATA)>

• <!ELEMENT dc:Subject (#PCDATA)>

• <!ELEMENT dc:Description (#PCDATA | rdf:Description)*>

• <!ELEMENT dc:Publisher (#PCDATA)>

• <!ELEMENT dc:Contributor (#PCDATA)>

• <!ELEMENT dc:Date (#PCDATA)>

• <!ELEMENT dc:Type (#PCDATA)>

• <!ELEMENT dc:Format (#PCDATA)>

• <!ELEMENT dc:Identifier (#PCDATA)>

• <!ELEMENT dc:Source (#PCDATA)>

• <!ELEMENT dc:Language (#PCDATA)>

• <!ELEMENT dc:Relation (#PCDATA | rdf:Description)*>

• <!ELEMENT dc:Rights (#PCDATA)>

• <!ELEMENT dcq:descriptionType (#PCDATA)>

• <!ELEMENT dcq:relationType (#PCDATA)>

• <!ELEMENT rdf:value (#PCDATA)>

• <!-- Ontology-definitions -->

• <!ELEMENT oil:ontology-definitions (oil:imports?, oil:rule-base?, (oil:class-def | oil:slot-def)*)>

• <!-- Import-section with URI's to other ontology-files -->

• <!ELEMENT oil:imports (oil:URI)+>

• <!ELEMENT oil:URI (#PCDATA)>

• <!-- Rules with URL to definition -->

• <!ELEMENT oil:rule-base (#PCDATA)>

• <!ATTLIST oil:rule-base

• type CDATA #REQUIRED

• >

• <!-- Class-expressions -->

• <!ENTITY % oil:class-expr "( oil:class | oil:slot-constraint | oil:AND | oil:OR | oil:NOT)">

• <!ELEMENT oil:AND ((%oil:class-expr;), (%oil:class-expr;)+)>

• <!ELEMENT oil:OR ((%oil:class-expr;), (%oil:class-expr;)+)>

• <!ELEMENT oil:NOT (%oil:class-expr;)>

• <!-- Class-definition -->

• <!ELEMENT oil:class-def (oil:class, oil:documentation?, oil:subclass-of?, oil:slot-constraint*)>

• <!ATTLIST oil:class-def

• type (primitive | defined) "primitive"

• >

• <!-- Class-name -->

• <!ELEMENT oil:class EMPTY>

• <!ATTLIST oil:class

• name CDATA #REQUIRED

• >

• <!ELEMENT oil:documentation (#PCDATA)>

• <!ELEMENT oil:subclass-of (%oil:class-expr;)+>

• <!-- Slot-definition -->

• <!ELEMENT oil:slot-def (oil:slot, oil:documentation?, oil:subslot-of?, oil:domain?, oil:range?, oil:inverse?, oil:properties?)>

• <!-- Slot-name -->

• <!ELEMENT oil:slot EMPTY>

• <!ATTLIST oil:slot

• name CDATA #REQUIRED

• >

• <!ELEMENT oil:subslot-of (oil:slot)+>

• <!ELEMENT oil:domain (%oil:class-expr;)+>

• <!ELEMENT oil:range (%oil:class-expr;)+>

• <!ELEMENT oil:inverse (oil:slot)>

• <!-- Slot-properties -->

• <!ELEMENT oil:properties (oil:transitive | oil:symmetric | oil:other)*>

• <!ELEMENT oil:transitive EMPTY>

• <!ELEMENT oil:symmetric EMPTY>

• <!ELEMENT oil:other (#PCDATA)>

• <!-- Slot-constraint -->

• <!ELEMENT oil:slot-constraint (oil:slot, (oil:has-value | oil:value-type | oil:cardinality | oil:max-cardinality | oil:min-cardinality)+)>

• <!ELEMENT oil:has-value (%oil:class-expr;)+>

• <!ELEMENT oil:value-type (%oil:class-expr;)+>

• <!ELEMENT oil:cardinality (oil:number, %oil:class-expr;)+>

• <!ELEMENT oil:max-cardinality (oil:number, %oil:class-expr;)+>

• <!ELEMENT oil:min-cardinality (oil:number, %oil:class-expr;)+>

• <!ELEMENT oil:number (#PCDATA)>

Notes: