Hi Gary,
Although I haven't represented any earth science topics, I'd be happy to provide some insight into how SIO could be used to formulate complex expressions to describe certain types or relations.
"channel_cross_section_trapezoid__bottom_width"
equivalentTo
sio:width
and sio:is-measurement-value-of some 'channel_cross_section_trapezoid__bottom'
'channel_cross_section_trapezoid__bottom'
equivalentTo
'bottom'
and sio:is-part-of some 'trapezoid'
and sio:is-attribute-of some 'channel cross section'
'channel cross section'
equivalentTo
'cross section'
and sio:is-part-of some 'channel'
of course, with more communication, it would be possible to more accurately capture things as per your definitions.
m.
--
Michel Dumontier
Associate Professor of Bioinformatics, Carleton University
Chair, W3C Semantic Web for Health Care and the Life Sciences Interest Group