2 Web Field Specifications

RacketUI generates a user interface based on an annotated specification of the types of data that the underlying function consumes and produces. The types of data that RacketUI supports are given by the web specs below. These are intended to correspond to the types of data used in How to Design Programs.

For the purposes of generating a user-friendly interface, specifications are annotated with text informally describing their purpose or interpretation in the context of the program.

It is possible to define a name for specifications that occur repeatedly:


(define/web id spec)

After this, id can be used in any context where a web spec is expected.