tree db01882b90f5353fa4771961a49d823e4418b0c8
parent 5a099946ac9ec9380fe1e3a338773330a5c3c98e
author Edwin Kempin <ekempin@google.com> 1577713964 +0100
committer Edwin Kempin <ekempin@google.com> 1578413681 +0100

Document Prolog predicate classes

For describing predicate parameters in the javadoc we use '+' as
indicator for input mode and '-' as indicator for output mode (see
[1,2]).

[1] https://www.swi-prolog.org/pldoc/man?section=preddesc
[2] https://stackoverflow.com/questions/4220651/question-mark-plus-minus-preceding-prolog-variable-names

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I3195563311fbca02b7f42100fa1e90a8fc90746d