Introduction to CHILL

image of Introduction to CHILL

CHILL1 is the high-level programming language defined and recommended by the International Telegraph and Telephone Consultative Committee (CCITT) for the production of software for telecommunication systems. The purpose of this document is to provide an overview of the main features of CHILL, by concentrating on their semantics and use, rather than on their syntax and subtle exceptional cases. The reader is not required to be familiar with CHILL, but is supposed to know at least another high-level programming language, such as Pascal.



Input and Output

A model is used for the description of the input/output facilities in an implementation-independent way. The model assumes that an organised amount of data (often referred to as datasets, files or devices) exist in the "outside world", i.e., in the external environment of a CHILL program. In the model, this data is called a "file". A file can be a physical device, a communication line or just a file in a file management system. In general, a file is an entity that can produce and/or consume data.


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