Can't access coordinates in TAP schema

[ebrassfieldbourke]

This could be my own ignorance here regarding the manifestation of the model via the vo-dml, however, I cannot find a way to actually get back the coordinates on an observation. If this is via POINT or another shape, I'm also not yet able to access those.
SELECT column_name, description FROM TAP_SCHEMA.columns WHERE table_name = 'targetposition'

Results in:
TAP result from UKSRC Archive Service on 2025-04-22T15:36:22Z SELECT column_name, description FROM TAP_SCHEMA.columns WHERE table_name = 'targetposition' column_name description equinox colDesc id colDes coordinates_id colDesc "coordsys" colDesc

Which shows a key id for coordinates, called coordinates_id. However, I cannot get a description to result for a coordinates table that will tell me how it is organised so that I can query it.
TAP result from UKSRC Archive Service on 2025-04-22T15:34:19Z SELECT column_name, description FROM TAP_SCHEMA.columns WHERE table_name = 'coordinates' column_name description

Following the schema diagram, it shows the datatype for coordinates to be caom2:caom2.types.Point, but I've not been able to find a way to use that yet, and I believe we were told there are no 'Shape' items available yet.