By a "local transformation (with respect to A)" I mean one that affects only a substring dominated by the single category symbol 'A'.[...] The example […] involves a transformation that is local with respect to a category 'A' ('A', in this case, being some type of Adverbial), and, furthermore, that introduces a string into a position dominated by the lexical category "B" which is immediately dominated by 'A'. Let us call such a transformation "strictly local". The only motivation for this highly special definition is that many of the examples of local transformations that come to mind meet this restrictive condition as well (for examples, quite generally, nominalization transformations that give such forms as "I persuaded John of my seriousness" from an underlying form "I persuaded John of N S", where S dominates the string underlying "I am serious" and the transformation substitutes a transform of this string for the dummy symbol occupying the position of the lexical category N, which is immediately dominated by the category symbol NP with respect to which the transformation is local).
- Chomsky (1969), a pag.215