Add note about using JSON for the file index format

diff --git a/docs/design_ideas.txt b/docs/design_ideas.txt
index 40bd001..d21009b 100644 (file)
--- a/docs/design_ideas.txt
+++ b/docs/design_ideas.txt
@@ -48,7 +48,11 @@ Intra2net specific requirement:
   It is just needed to perform the differential backup.
 
 - the file index uses an easily parsable, readable and extendable
-  format. XML might be a good choice.
+  format, JSON might be a good choice.
+
+  Good read on streaming JSON objects:
+  http://www.enricozini.org/2011/tips/python-stream-json/
+
 - The file index can become quite large: make sure it can always
   be processed as stream and never needs to be completely kept in RAM
 - Store file positions in the file index to make extraction