feat: allow to explicitly declare attributes as global

lib/properties.js

@@ -38,7 +38,7 @@ Properties.prototype.set = function(target, name, value) {
     if (property) {
       delete target[propertyName];
     } else {
-      delete target.$attrs[name];
+      delete target.$attrs[stripGlobal(name)];
     }
   } else {
 
@@ -51,7 +51,7 @@ Properties.prototype.set = function(target, name, value) {
         defineProperty(target, property, value);
       }
     } else {
-      target.$attrs[name] = value;
+      target.$attrs[stripGlobal(name)] = value;
     }
   }
 };
@@ -69,7 +69,7 @@ Properties.prototype.get = function(target, name) {
   var property = this.getProperty(target, name);
 
   if (!property) {
-    return target.$attrs[name];
+    return target.$attrs[stripGlobal(name)];
   }
 
   var propertyName = property.name;
@@ -173,4 +173,8 @@ function defineProperty(target, property, value) {
     value: value,
     configurable: true
   });
+}
+
+function stripGlobal(name) {
+  return name.replace(/^:/, '');
 }

test/spec/moddle.js

@@ -356,6 +356,38 @@ describe('moddle', function() {
         expect(element.get('props:count')).to.eql(10);
       });
 
+
+      it('should access global name', function() {
+
+        // when
+        const element = moddle.create('props:ComplexCount', {
+          ':xmlns': 'http://foo'
+        });
+
+        // then
+        expect(element.get(':xmlns')).to.eql('http://foo');
+        expect(element.get('xmlns')).to.eql('http://foo');
+
+        // available as extension attribute
+        expect(element.$attrs).to.have.property('xmlns');
+      });
+
+
+      it('should access global name (no prefix)', function() {
+
+        // when
+        const element = moddle.create('props:ComplexCount', {
+          'xmlns': 'http://foo'
+        });
+
+        // then
+        expect(element.get(':xmlns')).to.eql('http://foo');
+        expect(element.get('xmlns')).to.eql('http://foo');
+
+        // available as extension attribute
+        expect(element.$attrs).to.have.property('xmlns');
+      });
+
     });
 
 
@@ -438,6 +470,25 @@ describe('moddle', function() {
       });
 
 
+      it('should access global name', function() {
+
+        // when
+        const element = moddle.create('props:ComplexCount', {
+          ':xmlns': 'http://foo'
+        });
+
+        // then
+        expect(element.get(':xmlns')).to.eql('http://foo');
+
+        expect(() => {
+          element.get('xmlns');
+        }).to.throw(/unknown property <xmlns> on <props:ComplexCount>/);
+
+        // available as extension attribute
+        expect(element.$attrs).to.have.property('xmlns');
+      });
+
+
       it('fail accessing unknown property', function() {
 
         // when