/* This is a translator between computer-recognizable object identifiers (URIs) and human terms. Sunday 2007.07.22 kennyluck */ //ToDo: sorted array for optimization, I need a binary search tree... - Kenny Util.string.trim = function trim(str){return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');}; function Labeler(kb, LanguagePreference){ this.kb=kb; var ns = tabulator.ns; var trim = Util.string.trim; this.isLanguagePreferred = 10; //how much you like your language //this.lang=lang; // a universal version? how to sort? this.preferredLanguages = []; if (LanguagePreference){ var order = LanguagePreference.split(','); for (var i=order.length-1;i>=0;i--) this.preferredLanguages.push(trim(order[i].split(";")[0])); } this.LanguagePreference = LanguagePreference; this.addLabelProperty(ns.link('message'),20); //quite a different semantic, cause confusion? this.addLabelProperty(ns.foaf('name'),10); this.addLabelProperty(ns.dc('title'),8); this.addLabelProperty(ns.rss('title'),6); // = dc:title? this.addLabelProperty(ns.contact('fullName'),4); this.addLabelProperty(kb.sym('http://www.w3.org/2001/04/roadmap/org#name'),4); this.addLabelProperty(ns.foaf('nick'),3); this.addLabelProperty(ns.rdfs('label'),2); var lb=this; // Note that adding a newPropertyAction has retrospecive effect this.kb.newPropertyAction(ns.rdfs('subPropertyOf'), function(formula,subject,predicate,object,why) { if (!object.sameTerm(ns.rdfs('label'))) return; // Not doing transitive closure yet lb.addLabelProperty(subject); return; }); /* var hashP = subject.hashString(); var already; if (object.sameTerm(ns.rdfs('label'))) already=lb.addLabelProperty(subject, 3); if (already) return; var sts = kb.statementsMatching(undefined, subject); // Where was the subproperty used? for (var i=0;i< sts.length;i++){ // Where is the subproperty used? var st = sts[i]; if (typeof st.object.lang !='undefined' && st.object.lang!="" && st.object.lang != lb.lang ) continue; if (st.object.value == undefined) continue; // not literal - just in case var label = st.object.value.toLowerCase(); // Insert the new entry into the ordered list for (var i=0;i lb.entry[i][0].toLowerCase()){ lb.entry.splice(i+1,0,[st.object,st.subject,3]); break; } } lb.optimize([st.object,st.subject,3]); } }); */ } Labeler.prototype={ //[label,subject,strength] entry: [], priority: [], // Map hash to priority number labelDirectory:{}, //returns a literal term label: function(term){ var candidate=this.labelDirectory[term.hashString()]; return candidate?candidate[0]:undefined; }, // Add a new label property: // - set a callback so we are notified of new labels // addLabelProperty: function(property, priority){ if (this.kb.propertyActions[property.hashString()]) return true; //this is already loaded if (priority) this.priority[property.hashString()] = priority; var lb = this; this.kb.newPropertyAction(property, function (formula, subject, predicate, object,why){ var hashP = predicate.hashString(); var priority = lb.priority[hashP]; if (priority == undefined) priority = 3; var languageIndex = lb.preferredLanguages.indexOf(object.lang); if (languageIndex >= 0) priority = priority + (languageIndex + 1) * lb.isLanguagePreferred; // if (typeof object.lang !='undefined' && object.lang!="" && object.lang!=lb.lang) return; if (object.termType!='literal') return; //Request var label=object.value.toLowerCase(); var entryVol=lb.entry.length; if (entryVol==0) lb.entry.push([object,subject,priority]); else if (label>lb.entry[entryVol-1][0].value.toLowerCase()) lb.entry.push([object,subject,priority]) else{ for (var i=0;i"+lb.entry[i][0].toLowerCase(),subject,priority]); lb.entry.splice(i,0,[object,subject,priority]); break; } } } //tabulator.log.warn('Label: "'+object+'" for '+(''+subject).slice(-20)+ // ', via:'+(''+predicate).slice(-20)) // @@ lb.optimize([object,subject,priority]); }); }, // Entry is Label, Thing labeled, priority // Label Directory keeps the highest priority label for each thing. optimize: function(entry){ var subjectID=entry[1].hashString(); var preEntry=this.labelDirectory[subjectID]; var prePriority=preEntry?preEntry[2]:0; if (entry[2] > prePriority) { this.labelDirectory[subjectID]=entry; } }, search: function(searchString,limited){ var label=searchString.toLowerCase(); //case insensitive var match=false; var results=[]; var types=[]; for (var i=0;i<(limited||this.entry.length);i++){ var matchingString=this.entry[i][0].value.toLowerCase(); if (!match && string_startswith(matchingString,label)) match=true; else if (match &&!string_startswith(matchingString,label)) break; if (match){ if (this.kb.whether(this.entry[i][1],rdf('type'),tabulator.ns.link('Request'))) continue; results.push(this.entry[i]); types.push(this.kb.any(this.entry[i][1],rdf('type'))); } } return [results,types]; }, searchAdv: function(searchString,context,filterType){ //extends search var filter = (filterType=='predicate')?function(item) {return this.kb.predicateIndex[item.hashString()]|| //should use transitive closure, but this takes too long this.kb.whether(item,tabulator.ns.rdf('type'),tabulator.ns.rdf('Property'))|| this.kb.whether(item,tabulator.ns.rdf('type'),tabulator.ns.owl('DatatypeProperty'))|| this.kb.whether(item,tabulator.ns.rdf('type'),tabulator.ns.owl('ObjectProperty'));}:undefined; var label=searchString.toLowerCase(); //case insensitive var match=false; var results=[]; var types=[]; for (var i=0;i