and "VALUE" for all other input values. Use "INPUT?" and "VALUE?"
for optional inputs and values.
-Note that the Name and Id both have to be legal git-annex metadata field
-names. And should be lower cased. The user is allowed to use any case
-for the names when providing inputs and values to `git-annex addcomputed`
-though.
-
The interface can also optionally include a "REPRODUCIBLE" line.
That indicates that the results of its computations are
expected to be bit-for-bit reproducible.