Maintaining any good website requires some resources and that requires some money. Visual Schema chose to depend less on advertising revenue so that the website is less cluttered. As a result, an affiliate store has been added to Visual Schema, called Visual Store. This store is created using Amazon Associates Web Services (A2S or formerly known as Amazon ECS).
Just like well commented code makes it easy to understand, XML Schemas can be augmented with comments as well. This is done using the documentation element within the annotation element. Annotation element can be part of many of the XML Schema constructs.
Visual Schema provided a way to visualize the XML Schema definitions. Now, Visual Schemas can display the annotations as inline tooltips so that the schemas can be studied along with their comments. opentravel visual schemas are the first to get this functionality on our website.