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-rw-r--r--decoder/trule.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/decoder/trule.h b/decoder/trule.h
index e73fd0fe..acdbc5cf 100644
--- a/decoder/trule.h
+++ b/decoder/trule.h
@@ -125,7 +125,7 @@ class TRule {
WordID GetLHS() const { return lhs_; }
void ComputeArity();
- // 0 = first variable, -1 = second variable, -2 = third ...
+ // 0 = first variable, -1 = second variable, -2 = third ..., i.e. tail_nodes_[-w] if w<=0, TD::Convert(w) otherwise
std::vector<WordID> e_;
// < 0: *-1 = encoding of category of variable
std::vector<WordID> f_;