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IS
2008
10 years 12 months ago
DFL: A dataflow language based on Petri nets and nested relational calculus
In this paper we propose DFL -- a formal, graphical workflow language for dataflows, i.e., workflows where large amounts of complex data are manipulated, and the structure of the ...
Jan Hidders, Natalia Kwasnikowska, Jacek Sroka, Je...
DAGSTUHL
2007
11 years 1 months ago
Modelling with Relational Calculus of Object and Component Systems - rCOS
Abstract. This chapter presents a formalization of functional and behavioural requirements, and a reļ¬nement of requirements to a design for CoCoME using the Relational Calculus o...
Zhenbang Chen, Abdel Hakim Hannousse, Dang Van Hun...
VLDB
1987
ACM
108views Database» more  VLDB 1987»
11 years 3 months ago
Translating and Optimizing SQL Queries Having Aggregates
is at least ae powerful as SQL. Two well known relational query languages that have a sound theoretical foundation are relational algebra and relational calculus. As SQL is more cl...
Günter von Bültzingsloewen
IWPC
2003
IEEE
11 years 5 months ago
How Understanding and Restructuring Differ from Compiling - A Rewriting Perspective
Syntactic and semantic analysis are established topics in the area of compiler construction. Their application to the understanding and restructuring of large software systems rev...
Paul Klint
books