Make Term properties enumerable.

Author: RubenVerborgh

lib/N3DataFactory.js

@@ -19,7 +19,10 @@ function Term(id) {
 Term.subclass = function subclass(Type, name) {
   Type.prototype = Object.create(this.prototype, {
     constructor: { value: Type },
-    termType:    { value: name || Type.name },
+    termType: {
+      enumerable: true,
+      value: name,
+    },
   });
   Type.subclass = subclass;
 };
@@ -103,6 +106,7 @@ Term.subclass(NamedNode, 'NamedNode');
 
 // ### The IRI of this named node
 Object.defineProperty(NamedNode.prototype, 'value', {
+  enumerable: true,
   get: function () { return this.id; },
 });
 
@@ -117,6 +121,7 @@ Term.subclass(BlankNode, 'BlankNode');
 
 // ### The name of this blank node
 Object.defineProperty(BlankNode.prototype, 'value', {
+  enumerable: true,
   get: function () { return this.id.substr(2); },
 });
 
@@ -131,6 +136,7 @@ Term.subclass(Variable, 'Variable');
 
 // ### The name of this variable
 Object.defineProperty(Variable.prototype, 'value', {
+  enumerable: true,
   get: function () { return this.id.substr(1); },
 });
 
@@ -145,13 +151,15 @@ Term.subclass(Literal, 'Literal');
 
 // ### The text value of this literal
 Object.defineProperty(Literal.prototype, 'value', {
+  enumerable: true,
   get: function () {
     return this.id.substring(1, this.id.lastIndexOf('"'));
   },
 });
 
 // ### The language of this literal
 Object.defineProperty(Literal.prototype, 'language', {
+  enumerable: true,
   get: function () {
     // Find the last quotation mark (e.g., '"abc"@en-us')
     var id = this.id, atPos = id.lastIndexOf('"') + 1;
@@ -162,13 +170,15 @@ Object.defineProperty(Literal.prototype, 'language', {
 
 // ### The datatype IRI of this literal
 Object.defineProperty(Literal.prototype, 'datatype', {
+  enumerable: true,
   get: function () {
     return new NamedNode(this.datatypeString);
   },
 });
 
 // ### The datatype string of this literal
 Object.defineProperty(Literal.prototype, 'datatypeString', {
+  enumerable: true,
   get: function () {
     // Find the last quotation mark (e.g., '"abc"^^http://ex.org/types#t')
     var id = this.id, dtPos = id.lastIndexOf('"') + 1, ch;
@@ -215,7 +225,10 @@ DEFAULTGRAPH = new DefaultGraph();
 DEFAULTGRAPH.id = '';
 
 // ### The empty string
-Object.defineProperty(DefaultGraph.prototype, 'value', { value: '' });
+Object.defineProperty(DefaultGraph.prototype, 'value', {
+  enumerable: true,
+  value: '',
+});
 
 // ### Returns whether this object represents the same term as the other
 DefaultGraph.prototype.equals = function (other) {