diff --git a/baselibs.conf b/baselibs.conf
index f965f6f..7688918 100644
--- a/baselibs.conf
+++ b/baselibs.conf
@@ -1 +1,3 @@
 libthai0
+  provides "libthai-<targettype> = <version>"
+  obsoletes "libthai-<targettype> <= <version>"
diff --git a/libthai.changes b/libthai.changes
index b0775aa..56ea050 100644
--- a/libthai.changes
+++ b/libthai.changes
@@ -1,17 +1,23 @@
 -------------------------------------------------------------------
 Mon Jun 27 12:39:05 CEST 2011 - dimstar@opensuse.org
 
+- Apply SLPP (bnc#647012):
+  + Split out libthai0 subpackage
+  + Move thbrk.tri in new libthai-data subpackage
+  + Add libthai-data Requires to libthai0. This Requires use >=
+    %{version}, instead of =, since the data is not
+    parallel-installable with other versions. We can just hope the
+    data format will stay compatible (and the higher version will
+    be more complete).
+- Change License tag to LGPL-2.1+, as per spdx.org.
+- Do not require libdatrie-devel from the -devel package: it will
+  be added automatically the pkgconfig()-way.
+- Adjust baselibs.conf to follow the SLPP name change.
+- Change Group of the -devel package to be Development/Languages/C
+  and C++ instead of System/Libraries.
 - Stop using source services. Factory is moving away from it and a
   different approach to verify the authenticity of the tarballs is
   being implemented (by using the Source URL).
-- Apply SLPP (bnc#647012):
-  + Split out libthai0, package Requires libthai-data >= %{version}
-  + Move thbrk.tri to libthai-data
-- Change License tag to LGPL-2.1+, as per spdx.org.
-- Do not require libdatrie-devel from the -devel package: It is
-  added automatically the pkgconfig()-way.
-- Adjust baselibs.conf to follow the slpp name change.
-- Change RPM Group of the -devel package to be in Development.
 - spec file cleanups.
 
 -------------------------------------------------------------------
diff --git a/libthai.spec b/libthai.spec
index e7baef5..469f57e 100644
--- a/libthai.spec
+++ b/libthai.spec
@@ -19,7 +19,7 @@
 
 Name:           libthai
 Version:        0.1.15
-# FIXME: At next version update, replace Obsoltes <= with < only to fix RPMLint warning in libthai0.
+# FIXME: At next version update, replace Obsoletes <= with < only to fix RPMLint warning in libthai0 (here and in baselibs.conf)
 Release:        1
 License:        LGPL-2.1+
 Summary:        Thai Language Support Routines
@@ -39,11 +39,15 @@ word breaking, input and output methods, and basic character and string
 support.
 
 %package -n libthai0
+License:        LGPL-2.1+
 Summary:        Thai Language Support Routines
 Group:          System/Libraries
 # SLPP applied since version 0.1.15.
-Obsoletes:      libthai <= %{version}
 Provides:       libthai = %{version}
+Obsoletes:      libthai <= %{version}
+# libthai needs the data to run, but the data is not parallel-installable,
+# hence the >= instead of =. We just hope the data format will stay the same in
+# the future.
 Requires:       libthai-data >= %{version}
 
 %description -n libthai0
@@ -54,6 +58,7 @@ word breaking, input and output methods, and basic character and string
 support.
 
 %package data
+License:        LGPL-2.1+
 Summary:        Thai Language Support Routines - Data files
 Group:          System/Libraries
 
@@ -67,7 +72,7 @@ support.
 This package contains the data files for libthai.
 
 %package devel
-License:        LGPLv2.1+
+License:        LGPL-2.1+
 Summary:        Thai Language Support Routines (development files)
 Group:          Development/Languages/C and C++
 Requires:       libthai0 = %{version}