Abstract

There exist many formal schemes and tools for representing knowledge about different types of data. Sometimes we can gain a better understanding if our information has some graphical representation. In many cases arrows are very suitable visual objects for representing various data structures: different kinds of graphs, binary relations, mappings, categories and so on. An abstract form of this representation scheme is the notion of arrow structure, which, in this paper, is an algebraic version of the notion of directed multi-graph.

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