A Bigraph Relational Model
  In this paper, we present a model based on relations for bigraphical reactive systems [Milner09]. Its defining characteristics are that validity and reaction relations are captured as traces in a multi-set rewriting system. The relational model is derived from Milner's graphical definition and directly amenable to implementation. 
Maxime Beauquier (IT University of Copenhagen), Carsten Sch\"urmann   (IT University of Copenhagen)
cs.LO