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diff --git a/sfx2/README b/sfx2/README
index 7170fdb56ddd..143483439c62 100644
--- a/sfx2/README
+++ b/sfx2/README
@@ -1,4 +1,13 @@
-This is core gui code, containing base-classes for documents
+SFX is the "old" framework, used for historical reasons.
+
+It contains base classes for document model, view and controller, used
+by "old" applications like sw, sc, sd (while "new" applications
+are based on the "new" UNO based framework in "framework").
+
+The SFX framework is based on dispatching slots identified by integers
+(SlotIDs) to SfxShells, and there is a dedicated IDL compiler (svidl)
+involved that generates C++ slot headers from SDI files in modules' sdi/
+subdirectory.
Document load/save code is maintained in [git:sfx2/source/doc/docfile.cxx]
SfxMedium class, which handles all the twisty load and save corner cases.
@@ -6,3 +15,6 @@ SfxMedium class, which handles all the twisty load and save corner cases.
[git:sfx2/source/applappl/sfxhelp.cxx] Start procedure for the online
help viewer top level window; handling of help URL creation and
dispatch.
+
+There are also some UNO services here that could really be implemented
+anywhere, e.g. the DocumentProperties or DocumentMetadataAccess.