Axial Position <pos> <axes>

This syntax specifies a 3D position in space in terms of an axial coordinate system.

   >-- <pos> --+-- <axes> --.
               |            |
               ‘------------+-->

where:

<pos> = >--+-- <nsy> --+-- <udz> ----- <ewx> ---.
           |           |                        |
           |           |-- <ewx> --+-- <udz> ---|
           |           |           |            |
           |           |           ‘------------|
           |           |                        |
           |           ‘------------------------|
           |                                    |
           |-- <udz> --+-- <nsy> ----- <ewx> ---|
           |           |                        |
           |           |-- <ewx> --+-- <nsy> ---|
           |           |           |            |
           |           |           ‘------------|
           |           |                        |
           |           ‘------------------------|
           |                                    |
           ‘-- <ewx> --+-- <udz> ----- <nsy> ---|
                       |                        |
                       |-- <nsy> --+-- <udz> ---|
                       |           |            |
                       |           ‘------------|
                       |                        |
                       ‘------------------------+-->

and where:

<nsy> = >--+-- North --.
           |           |
           |-- Y ------|
           |           |
           ‘-- South --+-- <uval> -->
<udz> = >--+-- Up ----.
           |          |
           |-- Z -----|
           |          |
           ‘-- Down --+-- <uval> -->
<ewz> = >--+-- East --.
           |          |
           |-- X -----|
           |          |
           ‘-- West --+-- <uval> -->
<axes> = >--+-- WRT --.
            |         |
            ‘-- IN ---+--  <gid> -->