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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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#
# Event Driven Function for SPARQL Update
# Write @event before update query (after prefix)
# Write @event @update for processing @update event when function is @public
#

@event 
insert data {
us:John foaf:name 'John'
} ;
load rdf:


@beforeUpdate 
function us:beforeUpdate(q) {
    xt:print("before update", "graph size:", xt:size(xt:graph()))
}

@afterUpdate  
function us:afterUpdate(res) {
    xt:print("after update", "graph size:", xt:size(xt:graph()))
    # additional update query to ensure consistency
    #;query (delete {?x foaf:name ?n} insert {?x rdfs:label ?n} where {?x foaf:name ?n})
}

@update     
function us:update(q, deleteList, insertList) {
    xt:print("update delete:", deleteList) ;
    xt:print("update insert:", insertList)
}

@beforeLoad 
function us:beforeLoad(path) {
    xt:print("before load:", path, "graph size:", xt:size(xt:graph()))
}

@insert  # load edge
function us:insert(path, edge) {

}

@afterLoad  
function us:afterLoad(path) {
    xt:print("after load: ", path, "graph size:", xt:size(xt:graph()))
}