Initial commit

script/sql/create/26.labels.sql

@@ -0,0 +1,12 @@
+-- [LABELS]
+
+create table labels
+(
+  x float8 not null
+, y float8 not null
+, label text not null
+, node varchar(32) references _node(id)
+, primary key (x, y)
+);
+
+-- unset node when delete node