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-rw-r--r--sucl/strat.dcl1
1 files changed, 1 insertions, 0 deletions
diff --git a/sucl/strat.dcl b/sucl/strat.dcl
index d65972d..01589e0 100644
--- a/sucl/strat.dcl
+++ b/sucl/strat.dcl
@@ -8,6 +8,7 @@ from rule import Rule
from graph import Graph,Node
from StdOverloaded import ==
+from history import HistoryAssociation,HistoryPattern,Link // for History
from spine import Spine // for Answer
from spine import Subspine // for Spine
from rule import Rgraph // for History