A semantic view of ALGOL 68

This article presents a semantic view of the programming language ALGOL 68 [1]. The presentation emphasizes those elements of the language which form the basis for viewing an ALGOL 68 program as a composite expression, built-up through embedded expression layers. It is intended to give a glimpse of the semantic issues present in ALGOL 68 rather than a tutorial or general introduction. This discussion of the language defined by the Revised Report follows the treatment given by Branquart, Lewi, Sintzoff and Wodon [2] for the language defined by the original Report [3].