I .Abstract fic editors are cognisant of the syntax and rogramming language they manipulate. the various potential advantages of language speey have not been widely accepted by software serious somare development. On the other anipulation editors, which are also cognises ,they manipulate, have proven to be sucdomains such as drawing and VLSI design is worthwhile investigating the incorporanipulation mechanisms into program edits paper presents a technique for specifying direct tirlzg of

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... which is amenable to the uage specific editors incorporating dirlationpom a specification of the desired editing Language specific editors, direct manipulation, generation of language specific editors,