--- /dev/null
+
+$Header$
+
+How to add a new attribute (without WOK):
+-----------------------------------------
+
+This works only for simple types (ex: string)
+
+example: add attribute FileType (string)
+
+# new files (copied from files specific to ExternalFileDef attribute = string):
+
+? src/SALOMEDS/Handle_SALOMEDS_FileType.hxx <--- Handle_SALOMEDS_ExternalFileDef.hxx
+? src/SALOMEDS/SALOMEDS_AttributeFileType_i.cxx <--- SALOMEDS_AttributeExternalFileDef_i.cxx
+? src/SALOMEDS/SALOMEDS_AttributeFileType_i.hxx <--- SALOMEDS_AttributeExternalFileDef_i.hxx
+? src/SALOMEDS/SALOMEDS_FileType.cdl <--- SALOMEDS_ExternalFileDef.cdl
+? src/SALOMEDS/SALOMEDS_FileType.cxx <--- SALOMEDS_ExternalFileDef.cxx
+? src/SALOMEDS/SALOMEDS_FileType.hxx <--- SALOMEDS_ExternalFileDef.hxx
+? src/SALOMEDS/SALOMEDS_FileType.ixx <--- SALOMEDS_ExternalFileDef.ixx
+? src/SALOMEDS/SALOMEDS_FileType.jxx <--- SALOMEDS_ExternalFileDef.jxx
+
+# files modified:
+
+M idl/SALOMEDS_Attributes.idl
+M src/SALOMEDS/Makefile.in
+M src/SALOMEDS/SALOMEDS_SObject_i.cxx
+M src/SALOMEDS/SALOMEDS_StudyBuilder_i.cxx
+
+# detailled modifications:
+
+- in new files,
+change ExternalFileDef in FileType everywhere
+- in SALOMEDS_FileType.cxx,
+Standard_GUID (Global Universal IDentifier) must be changed.
+To obtain a new GUID, it is possible to use guidgen.exe on windows (with visual C++).
+
+- in src/SALOMEDS/Makefile.in,
+add under LIB_SRC = \
+ SALOMEDS_FileType.cxx \
+ SALOMEDS_AttributeExternalFileDef_i.cxx \
+
+- in src/SALOMEDS/SALOMEDS_SObject_i.cxx,
+- in src/SALOMEDS/SALOMEDS_StudyBuilder_i.cxx,
+- in idl/SALOMEDS_Attributes.idl,
+find portions of code containing ExternalFileDef, duplicate and replace
+
