Intital adding of script

n3validator.js

@@ -0,0 +1,49 @@
+var N3 = require('n3'), fs = require('fs'), N3Util = N3.Util;
+
+if (!process.argv[2]){
+	console.log('-- RDF N3/NTriples/Turtle file validator --');
+	console.log('node n3validator <path-to-file>');
+	process.exit(1);
+}
+
+console.log('Validating '+process.argv[2]);
+
+var parser = N3.Parser(),
+    turtleStream = fs.createReadStream(process.argv[2]);
+
+var errorCount = 0;
+
+parser.parse(turtleStream, function (error, triple, prefixes){
+	if (error){
+		console.log(error);
+		errorCount++;	   
+	}
+
+        if (triple) {
+		if (N3Util.isLiteral(triple.object)){
+			var value = N3Util.getLiteralValue(triple.object);
+			var type = N3Util.getLiteralType(triple.object);
+
+			type = type.replace('http://www.w3.org/2001/XMLSchema#','');
+		
+			switch(type) {
+				case 'float':
+				case 'double':
+					if (!value.match(/[-+]?\d*[.]\d+/)){
+					   console.log('WARNING: datatype does not validate for value ' + value);
+					   console.log(triple.subject, triple.predicate, triple.object, '.');	
+					}
+					break;
+				case 'int':
+					if (!value.match(/[-+]?\d*/)){
+						console.log('WARNING: int does not validate for value ' + value);
+						console.log(triple.subject, triple.predicate, triple.object, '.');
+					}	
+
+			}
+
+		}		
+	} else {
+	        console.log("Validation done: "+ errorCount + " errors found.");
+	}
+});