BFO upper classes of CARO:‘anatomical point’, CARO:'anatomical line' and CARO:'anatomical boundary'

[zhuyan166]

Currenly, anatomical point, line and boundary are inherited from BFO spatial regions:

CARO:'anatomical point' is-a BFO:'zero-dimensional spatial region'
CARO:'anatomical line' is-a BFO:'one-dimensional spatial region'
CARO:'anatomical boundary' is-a BFO:'two-dimensional spatial region'

However, anatomical space is the child of BFO site:
CARO:'anatomical space' is-a BFO:site

In my understanding, BFO spatial region is location or spatial coordination, which is static if its spatial reference are fixed.
In BFO, site and zero,one,two dimensional continuant fiat boundaries are designated two kinds of immaterial entities, while spatial region is the location of the immaterial entity.

BFO 2 Reference: Immaterial entities are divided into two subgroups:boundaries and sites, which bound, or are demarcated in relation, to material entities, and which can thus change location, shape and size and as their material hosts move or change shape or size (for example: your nasal passage; the hold of a ship; the boundary of Wales (which moves with the rotation of the Earth) [38, 7, 10
https://bioportal.bioontology.org/ontologies/BFO/?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FBFO_0000141

Every continuant fiat boundary is located at some spatial region at every time at which it exists. https://bioportal.bioontology.org/ontologies/BFO/?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FBFO_0000140

So, I suppose:
CARO:'anatomical point' is-a BFO:'zero-dimensional continuant fiat boundary'
CARO:'anatomical line' is-a BFO:'one-dimensional continuant fiat boundary'
CARO:'anatomical boundary' is-a BFO:'two-dimensional continuant fiat boundary'

Then,
'the geographic North Pole' (see the example of usage of BFO:'zero-dimensional continuant fiat boundary' https://bioportal.bioontology.org/ontologies/BFO/?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FBFO_0000147)
is similar with
'The tip of the nose' (see the example of usage of CARO:'anatomical point' https://bioportal.bioontology.org/ontologies/CARO/?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FCARO_0000009)

That makes sense.