Blueprint is Yahoo!’s platform for developing and distributing rich mobile Internet services. It offers a standards-based language, easy-to-use toolkit, innovative features, and support across multiple runtime environments—allowing developers to maximize their reach across thousands of mobile devices.
The architecture of the Blueprint includes:

The Blueprint language is a versatile, standard XML syntax based on xForms. It offers cutting-edge mobile features like location based services and mapping, along with powerful UI controls to design beautiful mobile experiences.
Now, the same Blueprint code can be used to create:
Download our SDK and developer tools to start building your Blueprint service. We provide you with detailed documentation, sample code, schemas and libraries, as well as a testing environment to QA your creation before you share it with the world.
Yahoo! provides a highly developed infrastructure for your Blueprint services, including a widget gallery that lets people discover your Blueprint services within Yahoo! Go, analytics offering usage insights, and advertising support to monetize your services.
Download the SDK to start creating your own masterpiece in Blueprint today.
Get the tools you need to create your mobile widget.
Already developed a mobile widget? Manage your widgets built, or learn more about marketing your widget.