Column names a spec produces, in output-declaration order.
A single-output op declares suffix '', so its column is the id; a band's three columns share the id as a prefix, which is the corpus's own convention and needs no mapping layer.
''
Column names a spec produces, in output-declaration order.
A single-output op declares suffix
'', so its column is the id; a band's three columns share the id as a prefix, which is the corpus's own convention and needs no mapping layer.