I have put a patch for the functionality here:
http://bugs.limesurvey.org/view.php?id=5103, plus a short survey showing how
to use the feature.
I've also added a post in the developer Forum describing the features and
next steps a bit:
Now that the equation parser works, we can consider giving users a choice
for the following:
(1) Branching Logic - Use Conditions Module and/or Equation Parser (by
adding a "relevance" equation to each question - only relevant questions
will be asked)
(2) Assessments - Use the Assessment Module and/or Equation Parser (since
the EP can compute assessment scores on the fly, and store their values in
a hidden Equation question type - see issue
(3) Replacement Fields and Tokens - use current process and/or Equation
Parser (since it can insert values for any question, and can be extended to
insert values for all tokens)
I believe this functionality is synergistic with the CI conversions, so I
hope we can move quickly (but safely, of course) to make it available in the
main and ci branches.
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