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Lexikon

PROgrammed Graph REwriting Systems

(PROGRES) A very high level language based on href="module.php?name=Lexikon&file=search&eid=1&query=graph grammar">graph grammars, developed by Andy Scheurr h-aachen.de> and Albert Zuendorf h-aachen.de> of href="module.php?name=Lexikon&file=search&eid=1&query=RWTh">RWTh, Aachen in 1991. PROGRES supports structurally href="module.php?name=Lexikon&file=search&eid=1&query=object-oriented specification">object-oriented specification of href="module.php?name=Lexikon&file=search&eid=1&query=attributed graph">attributed graph structures with href="module.php?name=Lexikon&file=search&eid=1&query=multiple inheritance">multiple inheritance hierarchies and types of types (for {parametric polymorphism}). It also supports declarative/relational specification of derived attributes, node sets, binary relationships (directed edges) and href="module.php?name=Lexikon&file=search&eid=1&query=Boolean">Boolean href="module.php?name=Lexikon&file=search&eid=1&query=constraint">constraints, rule-oriented/visual specification of parameterised graph rewrite rules with complex application conditions, href="module.php?name=Lexikon&file=search&eid=1&query=nondeterministic">nondeterministic and imperative programming of composite graph transformations (with built-in href="module.php?name=Lexikon&file=search&eid=1&query=backtracking">backtracking and cancelling arbitrary sequences of failing graph modifications). It is used for implementing href="module.php?name=Lexikon&file=search&eid=1&query=abstract data type">abstract data types with graph-like internal structure, as a visual language for the href="module.php?name=Lexikon&file=search&eid=1&query=graph-oriented database">graph-oriented database href="module.php?name=Lexikon&file=search&eid=1&query=GRAS">GRAS, and as a rule-oriented language for prototyping href="module.php?name=Lexikon&file=search&eid=1&query=nondeterministic">nondeterministically specified data/rule base transformations. PROGRES has a formally defined href="module.php?name=Lexikon&file=search&eid=1&query=semantics">semantics based on "PROgrammed Graph Rewriting Systems". It is an almost href="module.php?name=Lexikon&file=search&eid=1&query=statically typed">statically typed language which additionally offers "down casting" operators for run time checked type casting/conversion (in order to avoid severe restrictions concerning the language' s expressiveness). Version RWTh 5.10 includes an integrated environment. [A. Scheurr, "Introduction to PROGRES, an Attribute Graph Grammar Based Specification Language", in Proc WG89 Workshop on Graphtheoretic Concepts in Computer Science", LNCS 411, Springer 1991]. href="ftp://ftp.informatik.rwth-aachen.de/pub/Unix/PROGRES/"> for href="module.php?name=Lexikon&file=search&eid=1&query=Sun-4">Sun-4. (1993-11-02)

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Free On-line Dictionary of Computing

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