Webservice::InterMine::Constraint::Ternary - A representation of a dual value constraint.
my $constraint = $query->add_constraint("Gene", "LOOKUP" "zen", "D. melanogaster"); ok($constraint->isa("Webservice::InterMine::Constraint::Ternary"));
Constraints are constructed by queries based on the arguments to
add_constraint, or a similar method (such as
where). Ternary constraints constrain the identities of objects, for which there is as present one operator:
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