Welcome to the mailing list for the Blobs diagram editor. I'm hoping that some new members will tell us about their interest in Blobs - in what applications do you forsee using it? What application-specific needs do you think you will want to layer on top of the basic editor? Maybe this will provoke some thoughts about how best to design the interfaces between the editor and user-code, to promote greater generality and re-usability. Arjan and Martijn have already presented (on the web etc) a lot of information about their Dazzle tool, from which Blobs was born. For myself, I have developed a theoretical framework called the "Failure Propagation and Transformation Calculus", used for analysing the safety of systems architectures. Nodes represent hardware/software components and communications protocols, whilst edges represent error flows between them (currently based on dataflow and control flow). The user annotates each component with an expression denoting its ability to fail, and its response to incoming failures. The calculus then determines the maximal set of failures that can flow through any edge of the diagram. My analysis routine takes an input graph, and returns the same graph, but with every edge annotated with some new information, which is simply passed back into Blobs for visualisation. However, I can certainly imagine that other people will want to do more complex operations on graphs. Let's hear about them! Regards, Malcolm