Abstract
SIMON is a grammar-based transformation system for restructuring documents.
Its target applications include meta-level specification of document
assembly, view definition and retrieval for multiview documents,
and document type evolution. The internal document model is based
on attribute grammars, and it interfaces with external document models
such as SGML through input and output conversion. The transformation
engine of SIMON is an amalgamation of syntax-directed computation
and content-oriented computation: the former is through higher-order
(and related) extensions of attribute grammars, whereas the latter
is done by externally defined programs and it is for computation
not naturally amenable to the syntax-directed paradigm. The current
implementation of SIMON employs the higher-order extension proposed
by H. H. Vogt, S. D. Swierstra, and M. F. Kuiper for the syntax-directed
computation, and C++ for the content-oriented computation
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