+STR
+DOC
+MAP
=VAL "top1
+MAP
=VAL "key1
=VAL &alias1 :scalar1
-MAP
=VAL 'top2
+MAP
=VAL 'key2
=VAL &alias2 :scalar2
-MAP
=VAL :top3
+MAP &node3
=ALI *alias1
=VAL :scalar3
-MAP
=VAL :top4
+MAP
=ALI *alias2
=VAL :scalar4
-MAP
=VAL :top5
=VAL :scalar5
=VAL :top6
+MAP
=VAL &anchor6 'key6
=VAL :scalar6
-MAP
-MAP
-DOC
-STR
