1234567891011121314151617 +STR+DOC+MAP {}+SEQ [] &a=VAL :a=VAL &b :b-SEQ=ALI *b=ALI *a+SEQ []=VAL :c=ALI *b=VAL :d-SEQ-MAP-DOC-STR
+STR
+DOC
+MAP {}
+SEQ [] &a
=VAL :a
=VAL &b :b
-SEQ
=ALI *b
=ALI *a
+SEQ []
=VAL :c
=VAL :d
-MAP
-DOC
-STR