add a little overview

git-svn-id: https://svn.dealii.org/trunk@11201 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/doc/doxygen/headers/base/dox.h b/deal.II/doc/doxygen/headers/base/dox.h
index a2ec74c11faef2af83ed2a2fdc15e5cb6dbee866..e7cae40b4a4fb83dc9ad5f63fbc34eb1bb6d0e91 100644 (file)
--- a/deal.II/doc/doxygen/headers/base/dox.h
+++ b/deal.II/doc/doxygen/headers/base/dox.h
@@ -39,4 +39,18 @@
  *
  * This module collects the classes used for reading and writing
  * meshes and data.
+ *
+ * The list of supported formats can be found in the
+ * description of the classes
+ * <ul>
+ * <li> GridIn for reading meshes,
+ * <li> GridOut for writing meshes,
+ * <li> DataOutBase for writing simulation results.
+ * </ul>
+ *
+ * For writing data, you would normally use objects of the class
+ * DataOut (DataOutBase only provides the low level output
+ * functions). Still, there are some other options for more
+ * specialized needs, like DataOutFaces, DataOutRotation and
+ * DataOutStack.
  */