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-rw-r--r--lib/Travel/Status/DE/VRR/Result.pm6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Travel/Status/DE/VRR/Result.pm b/lib/Travel/Status/DE/VRR/Result.pm
index 05f86d9..00f30c0 100644
--- a/lib/Travel/Status/DE/VRR/Result.pm
+++ b/lib/Travel/Status/DE/VRR/Result.pm
@@ -95,8 +95,10 @@ an empty string.
=item $departure->key
-Unknown. Appears to be the UUID for this departure (unique over all
-lines, reused daily).
+Unknown. Unlike the name may suggest, this is not a unique key / UUID for a
+departure: On the same day, different lines departing at the same station
+may have the same key. It might, however, be unique when combined with the
+B<line> information.
=item $departure->line