Deprecate column "type prefixes"?

I don't even know how to call them since I never understood their use.
I mean using "organism" instead of "characteristic[organism]"

Especially now with the templates, you can represent "groups" of columns differently if you desperately think this is necessary.

Review the existing definition and examples of column type prefixes, including the `organism` versus `characteristic[organism]` forms, and compare them with the template approach mentioned in the issue. Determine whether the syntax has a documented purpose and agree on a deprecation or retention decision; the issue does not identify files, tests, or a settled implementation scope.

Written by the indexing model from the issue text.