@prefix rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix log:  <http://www.w3.org/2000/10/swap/log#>.
@prefix list: <http://www.w3.org/2000/10/swap/list#>.
@prefix skos: <http://www.w3.org/2004/02/skos/core#>.
@prefix func: <http://www.w3.org/2007/rif-builtin-function#>.
@prefix dce:  <http://purl.org/dc/elements/1.1/>.


<http://eulersharp.sourceforge.net/2003/03swap/skos-rules>
    dce:title "SKOS rules"@en;
    dce:creator "Giovanni Mels";
    dce:publisher "Agfa Healthcare/Belgium"@en;
    dce:description "SKOS axioms expressed as N3 rules."@en;
    rdfs:seeAlso <http://www.w3.org/TR/skos-reference>.


{ ?c skos:topConceptOf  ?s } => { ?s skos:hasTopConcept ?c }.
{ ?s skos:hasTopConcept ?c } => { ?c skos:topConceptOf  ?s }.

{ ?x skos:related ?y } => { ?y skos:related ?x }.

{ ?x skos:narrower ?y } => { ?y skos:broader  ?x }.
{ ?x skos:broader  ?y } => { ?y skos:narrower ?x }.
{ ?x skos:narrowerTransitive ?y } => { ?y skos:broaderTransitive  ?x }.
{ ?x skos:broaderTransitive  ?y } => { ?y skos:narrowerTransitive ?x }.

{ ?x skos:narrowerTransitive ?y. ?y skos:narrowerTransitive ?z } => { ?x skos:narrowerTransitive ?z }.
{ ?x skos:broaderTransitive  ?y. ?y skos:broaderTransitive  ?z } => { ?x skos:broaderTransitive  ?z }.

{ ?x skos:memberList ?L. ?e list:in ?L } => { ?x skos:member ?e }.

{ ?x skos:narrowMatch ?y } => { ?y skos:broadMatch  ?x }.
{ ?x skos:broadMatch  ?y } => { ?y skos:narrowMatch ?x }.

{ ?x skos:relatedMatch ?y } => { ?y skos:relatedMatch ?x }.
{ ?x skos:closeMatch   ?y } => { ?y skos:closeMatch   ?x }.
{ ?x skos:exactMatch   ?y } => { ?y skos:exactMatch   ?x }.

{ ?x skos:exactMatch ?y. ?y skos:exactMatch ?z } => { ?x skos:exactMatch ?z }.

{ ?x skos:broaderTransitive  ?y } => { ?x skos:semanticRelation ?y }.
{ ?x skos:narrowerTransitive ?y } => { ?x skos:semanticRelation ?y }.
{ ?x skos:related            ?y } => { ?x skos:semanticRelation ?y }.
{ ?x skos:mappingRelation    ?y } => { ?x skos:semanticRelation ?y }.

{ ?x skos:broader  ?y } => { ?x skos:broaderTransitive ?y  }.
{ ?x skos:narrower ?y } => { ?x skos:narrowerTransitive ?y }.

{ ?x skos:closeMatch ?y   } => { ?x skos:mappingRelation ?y }.
{ ?x skos:broadMatch ?y   } => { ?x skos:mappingRelation ?y }.
{ ?x skos:narrowMatch ?y  } => { ?x skos:mappingRelation ?y }.
{ ?x skos:relatedMatch ?y } => { ?x skos:mappingRelation ?y }.

{ ?x skos:broadMatch  ?y } => { ?x skos:broader  ?y }.
{ ?x skos:narrowMatch ?y } => { ?x skos:narrower ?y }.

{ ?x skos:exactMatch ?y } => { ?x skos:closeMatch ?y }.

{ ?x skos:relatedMatch ?y } => { ?x skos:related ?y }.

{ ?c skos:topConceptOf ?s } => { ?c skos:inScheme ?s }.

{ ?c skos:changeNote    ?n } => { ?c skos:note ?n }.
{ ?c skos:definition    ?n } => { ?c skos:note ?n }.
{ ?c skos:editorialNote ?n } => { ?c skos:note ?n }.
{ ?c skos:example       ?n } => { ?c skos:note ?n }.
{ ?c skos:historyNote   ?n } => { ?c skos:note ?n }.
{ ?c skos:scopeNote     ?n } => { ?c skos:note ?n }.

{ ?c skos:inScheme ?s } => { ?s a skos:ConceptScheme }.
{ ?s skos:hasTopConcept ?c } => { ?s a skos:ConceptScheme. ?c a skos:Concept }.
{ ?x skos:semanticRelation ?y } => { ?x a skos:Concept. ?y a skos:Concept }.
{ ?c a skos:OrderedCollection } => { ?c a skos:Collection }.
{ ?s skos:member ?c } => { ?s a skos:Collection }.
{ ?s skos:memberList ?L } => { ?s a skos:OrderedCollection. ?L a rdf:List }.



#
# integrity constraints
#

# skos:ConceptScheme, skos:Concept and skos:Collection are all disjoint.
{ ?x a skos:ConceptScheme, skos:Concept } => false.
{ ?x a skos:Collection, skos:Concept } => false.
{ ?x a skos:Collection, skos:ConceptScheme } => false.

# Hierarchical and associative relations are disjoint.
{ ?x skos:related ?y. ?x skos:broaderTransitive ?y } => false.

# Exact and hierarchical relations are disjoint.
{ ?x skos:exactMatch ?y. ?x skos:broadMatch ?y } => false.

# Exact and associative relations are disjoint.
{ ?x skos:exactMatch ?y. ?x skos:relatedMatch ?y } => false.

# skos:memberList is a functional property.
{ ?c skos:memberList ?L1, ?L2. ?L1 log:notEqualTo ?L2 } => false.

# skos:prefLabel, skos:altLabel and skos:hiddenLabel are all disjoint.
{ ?c skos:prefLabel ?l; skos:altLabel ?l } => false.
{ ?c skos:prefLabel ?l; skos:hiddenLabel ?l } => false.
{ ?c skos:altLabel ?l; skos:hiddenLabel ?l } => false.

# A resource has no more than one value of skos:prefLabel per language tag.
{ ?c skos:prefLabel ?x, ?y. ?x log:notEqualTo ?y. (?x) func:lang-from-PlainLiteral ?lang. (?y) func:lang-from-PlainLiteral ?lang } => false.
