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Lexikon

PROgrammed Graph REwriting Systems

(PROGRES) A very high level language based on ref="module.php?name=Lexikon&file=search&eid=1&query=graph grammar">graph grammars, developed by Andy Scheurr and Albert Zuendorf of ref="module.php?name=Lexikon&file=search&eid=1&query=RWTH">RWTH, Aachen in 1991. PROGRES supports structurally ref="module.php?name=Lexikon&file=search&eid=1&query=object-oriented specification">object-oriented specification of ref="module.php?name=Lexikon&file=search&eid=1&query=attributed graph">attributed graph structures with ref="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 ref="module.php?name=Lexikon&file=search&eid=1&query=Boolean">Boolean ref="module.php?name=Lexikon&file=search&eid=1&query=constraint">constraints, rule-oriented/visual specification of parameterised graph rewrite rules with complex application conditions, ref="module.php?name=Lexikon&file=search&eid=1&query=nondeterministic">nondeterministic and imperative programming of composite graph transformations (with built-in ref="module.php?name=Lexikon&file=search&eid=1&query=backtracking">backtracking and cancelling arbitrary sequences of failing graph modifications). It is used for implementing ref="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 ref="module.php?name=Lexikon&file=search&eid=1&query=graph-oriented database">graph-oriented database ref="module.php?name=Lexikon&file=search&eid=1&query=GRAS">GRAS, and as a rule-oriented language for prototyping ref="module.php?name=Lexikon&file=search&eid=1&query=nondeterministic">nondeterministically specified data/rule base transformations. PROGRES has a formally defined ref="module.php?name=Lexikon&file=search&eid=1&query=semantics">semantics based on "PROgrammed Graph Rewriting Systems". It is an almost ref="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]. ref="ftp://ftp.informatik.rwth-aachen.de/pub/Unix/PROGRES/"> for ref="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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