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rJX/src/ext/view/HTMLView.js
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HTMLView.js
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			/**
			* Dumb HTML views. Mostly to demonstrate how the visitor pattern over these
			* views works, as driven by validation. I'm not convinced it's actually a good
			* idea to do validation.
			*
			* @provides javelin-view-html
			* @requires javelin-install
			* javelin-view
			*/

			JX.install('HTMLView', {
			extend: 'View',
			members : {
			render: function(rendered_children) {
			return JX.$N(this.getName(), this.getAllAttributes(), rendered_children);
			},
			validate: function() {
			this.accept(JX.HTMLView.getValidatingVisitor());
			}
			},

			statics: {
			getValidatingVisitor: function() {
			return new JX.ViewVisitor(JX.HTMLView.validate);
			},

			validate: function(view, children) {
			var spec = this._getHTMLSpec();
			if (!view.getName() in spec) {
			throw new Error("invalid tag");
			}

			var tag_spec = spec[view.getName()];

			var attrs = view.getAllAttributes();
			for (var attr in attrs) {
			if (!(attr in tag_spec)) {
			throw new Error("invalid attr");
			}

			var validator = tag_spec[attr];
			if (typeof validator === "function") {
			return validator(attrs[attr]);
			}
			}

			return true;
			},

			_validateRel: function(target) {
			return target in {
			"_blank": 1,
			"_self": 1,
			"_parent": 1,
			"_top": 1
			};
			},
			_getHTMLSpec: function() {
			var attrs_any_can_have = {
			className: 1,
			id: 1,
			sigil: 1
			};

			var form_elem_attrs = {
			name: 1,
			value: 1
			};

			var spec = {
			a: { href: 1, target: JX.HTMLView._validateRel },
			b: {},
			blockquote: {},
			br: {},
			button: JX.copy({}, form_elem_attrs),
			canvas: {},
			code: {},
			dd: {},
			div: {},
			dl: {},
			dt: {},
			em: {},
			embed: {},
			fieldset: {},
			form: { type: 1 },
			h1: {},
			h2: {},
			h3: {},
			h4: {},
			h5: {},
			h6: {},
			hr: {},
			i: {},
			iframe: { src: 1 },
			img: { src: 1, alt: 1 },
			input: JX.copy({}, form_elem_attrs),
			label: {'for': 1},
			li: {},
			ol: {},
			optgroup: {},
			option: JX.copy({}, form_elem_attrs),
			p: {},
			pre: {},
			q: {},
			select: {},
			span: {},
			strong: {},
			sub: {},
			sup: {},
			table: {},
			tbody: {},
			td: {},
			textarea: {},
			tfoot: {},
			th: {},
			thead: {},
			tr: {},
			ul: {}
			};

			for (var k in spec) {
			JX.copy(spec[k], attrs_any_can_have);
			}

			return spec;
			},
			registerToInterpreter: function(view_interpreter) {
			var spec = this._getHTMLSpec();
			for (var tag in spec) {
			view_interpreter.register(tag, JX.HTMLView);
			}
			return view_interpreter;
			}
			}
			});

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