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Tree Transformation Language : FOLDOC | Tree Transformation Language (TXL) A hybrid functional language and {rule-based language} developed by J.R. Cordy et al of Queen's University, Canada in 1988. TXL is suitable for performing source to source analysis and transformation and for rapidly prototyping new languages and language processors. It uses {structural transformation} based on {term rewriting}. TXL has been particularly successful in software engineering tasks such as design recovery, refactoring, and {reengineering}. Most recently it has been applied to artificial intelligence tasks such as recognition of hand-written mathematics, and to transformation of {structured documents} in XML. TXL takes as input an arbitrary {context-free grammar} in extended BNF-like notation, and a set of {show-by-example} transformation rules to be applied to inputs parsed using the grammar. TXL supports the notion of {agile parsing}, the ability
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