Refined graph rewriting in span-categories: a framework for algebraic graph transformation

  • Authors:
  • Michael Löwe

  • Affiliations:
  • FHDW-Hannover, Hannover, Germany

  • Venue:
  • ICGT'12 Proceedings of the 6th international conference on Graph Transformations
  • Year:
  • 2012

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Abstract

There are three major algebraic approaches to graph transformation, namely the double-pushout (DPO), single-pushout (SPO), and sesqui-pushout approach (SqPO). In this paper, we present a framework that generalises all three approaches. The central issue is a gluing construction, which is a generalisation of the construction introduced in [14]. It has pushout-like properties wrt. composition and decomposition, which allow to reestablish major parts of the theory for the algebraic approaches on a general level. We investigate parallel independence here.