Lout 3.17.

git-svn-id: http://svn.savannah.nongnu.org/svn/lout/trunk@2 9365b830-b601-4143-9ba8-b4a8e2c3339c

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+@Chapter
+   @Title { Diagrams }
+   @Tag { diagrams }
+@Begin
+@LP
+This chapter describes how to use the @@Diag symbol
+diag. @Index { @@Diag }
+@FootNote {
+Prior to Version 3.09 of Lout, this chapter described a symbol called
+fig. @Index @Code "@Fig"
+{@Code "@Fig"} which was similar to but more primitive than
+{@Code "@Diag"}.  For backward compatibility the @Code "@Fig" symbol
+is still available and still works exactly as described in the old
+documentation, but there is no reason to use it in new documents.
+}
+to make diagrams like this one:
+diag. @Index @Code "@Diag"
+@CD @Diag
+    margin { 0.2c }
+{
+-2p @Font
+{ A:: @Ellipse { 25, 39 }
+/0.3c |0.2c B:: @Ellipse { 43 } |0.1c |0.8c E:: @Box outlinestyle {noline} {Problem node}
+/0.3c C:: @Ellipse { 40, 41 } | | D:: @Ellipse paint { lightgrey } {44, 45, 46}
+}
+// @Link from { A } to { B }
+// @Link from { B } to { C }
+// @Link from { B } to { D }
+// @Arrow from { E } to { D }
+}
+@@Diag offers nodes and links, arrows, labels, positioning using coordinates,
+and tree diagrams.
+@BeginSections
+@Include { dia_intr }
+@Include { dia_node }
+@Include { dia_link }
+@Include { dia_tags }
+@Include { dia_labe }
+@Include { dia_posi }
+@Include { dia_tree }
+@Include { dia_erro }
+@Include { dia_defi }
+@Include { dia_geom }
+@Include { dia_summ }
+@EndSections
+@End @Chapter