Webel: If you must name your Ports or Pins, name them simply 'i', 'o', or 'io' (or 'oi') to indicate direction UNLESS you have to indicate a special role like 'iRole', 'oAuxiliary'. DO NOT use Port or Pin names like 'input', 'output', etc.

It's also recommended here that you avoid Port names with 'ip' for input and 'op' for output, just use 'i' and 'o' (together with any indicator of special role if the Type alone is not a sufficient indicator): The reason 'oi' rather than 'io' is sometimes used for inout in Webel examples is this:

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