path module

[Skip Montanaro]

    Hallvard> It's a long time since I used anything like that, but I think
    Hallvard> Tops-20 filename paths looked like this:

    Hallvard>     device:<dir.dir.dir>file.ext;version

    Hallvard> where most components were optional.

which is (not too surprisingly) very similar to VMS:

    device:[dir.dir.dir]file.ext;version

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