Ruby On Rails - Rails is a full-stack, open-source web framework in Ruby for writing real-world applications with joy and less code than most frameworks spend doing XML sit-ups. Being a full-stack framework means that all layers are built to work seamlessly together. That way you Don’t Repeat Yourself (DRY) and you can use a single language from top to bottom. Everything from templates to control flow to business logic is written in Ruby—the language of love for industry heavy-weights. In striving for DRY compliance, Rails shuns configuration files and annotations in favor of reflection and run-time extensions. This means the end of XML files telling a story that has already been told in code. It means no compilation phase: Make a change, see it work. Meta-data is an implementation detail left for the framework to handle. This has been added to World Wide Web Reference Subject Tracer™ Information Blog.