Chapter  2: Doing More with HDML

This chapter describes more advanced features of the HDML language. Specifically, it describes how to use:

• Activities, which help you organize and define your service's interface

• No-display cards, which allow you to initialize variables and "tune" your service's navigation model

• Bookmarking options, which allow you to specify how the user can bookmark cards in your service

• Digests, which allow you to package transmissions to the UP.Link server and make them more efficient

• HDML help features, which allow you to provide online help for your service