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A list of 39 tools is given, related to 40 projects: one project may rely on several tools, one tool may be used by several projects. Some tools are used in only one project, while some other tools may be used in as much as eleve nprojects.
The use of some tool in some project is indicated by a sign, which is differentiated along its its as a diagram of interio- rity or exteriority. Some tools are only related to interiority or exteriority, respectively, while other ones may be related to both, sometimes even in the same project.
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