Loom is an open source Java web framework that handle user input validation and HTML generation for enterprise applications of any size. There are some important features that differentiate Loom from other frameworks:

* Validation of user input is performed using annotations, which allows for reuse of any existing JPA or hibernate annotations.
* Strong separation of concerns via CSS and unobtrusive JavaScript.
* It takes accessibility very seriously. An outstanding Ajax interface should not be incompatible with this.
* Originally developed to deliver real software. As a result common practices such as database persistence, progressive enhancement and highly-responsive UIs have been included in a way as transparent as possible.
* Internationalization is deeply rooted in the framework architecture.
* A complete tag library to help with the everyday issues of any REST application.
* A separate javascript library that can be completely replaced at any time.