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Corese is a Semantic Web Factory (triple store and SPARQL endpoint) implementing RDF, RDFS, SPARQL 1.1 Query and Update, Shacl. STTL. LDScript.

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#
# clean OWL ontology, remove duplicate statements
#
insert {} 
where {
    bind (fun:clean() as ?f)
}

@public @prepareEntailment 
function us:prepareEntailment(re, q) {
        xt:print("prepare entailment:", xt:size(xt:graph()));
        xt:print(q); return(0)
}

@beforeUpdate
function us:beforeUpdate(q) {
    xt:print("@before");
    java:setDetail(q, true)
    #;xt:print(java:getAST(q))
}

@afterUpdate
function us:afterUpdate(m) {
    xt:print("@after");
    if (xt:size(m) > 0) {
        xt:print(java:getAST(java:getQuery(m)));
        xt:print("result:", xt:size(m));
        xt:print()
    }
}

@update
function us:update(q, del, ins) {
    xt:print("@update:", xt:size(del), xt:size(ins));
    us:delete(del);
    xt:print();
    us:insert(ins)
}


function us:delete(list) {
    let (num = 0) {
        for (edge in list) {
            xt:print("delete:", edge);
            if (set(num = num + 1) >= 20, return (true), true)
        }
    }
}

function us:insert(list) {
   let (num = 0) {
        for (edge in list) {
            xt:print("insert:", edge);
            if (set(num = num + 1) >= 4, return (true), true)
        }
    }
}