i realized i was too naive: the "principle" of the spanning tree is ok, but it is not enough.
suppose to have five legs at a station 6-7 7-8 20-7 7-21 7-45 and some of them belongs to loop(s). Suppose that the user wants to have 6-7 7-8 together, and 20-7 7-21 together but the two pairs separated, because of the way loops get extended. and 7-45 attached to 6-7 7-8 at station 7. the abstract picture i came up with was to replace a crossway station, like "7" in the above example, with a complete graph (for 3-leg crossway this is trivial) to make the story short i think therion syntax needs a way to specify that 6-7 7-8 and 7-45 share station "7" in the extended elevation and 20-7 7-21 share a separate station "7". marco _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion
