The UMarks format is the universal bookmark system that is standards-based, lightweight and simple to implement.
UMarks Explained

Documentation

Current Version

UMarks is new, and in development. If you have an interest in classification systems, squeaky clean organization, XML-based file systems, or the semantic web, then why not have a look and get involved? We welcome feedback on any aspect of UMarks, especially the tags. You may also want a look at our To Do list.