From 07f955320b15c813978163be7b46ef9e45b3cd49 Mon Sep 17 00:00:00 2001
From: Cristian C Lalescu <Cristian.Lalescu@ds.mpg.de>
Date: Sun, 31 Jan 2016 11:25:21 +0100
Subject: [PATCH] add comments on work in progress

---
 documentation/_static/development.rst | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/documentation/_static/development.rst b/documentation/_static/development.rst
index 446bc1ab..423a4489 100644
--- a/documentation/_static/development.rst
+++ b/documentation/_static/development.rst
@@ -57,3 +57,30 @@ Code testing
 ------------
 
 Testing for :mod:`bfps` is done with ``tox``.
+
+----------------
+Work in progress
+----------------
+
+HDF5 field I/O
+--------------
+
+As you can tell from the ``todo.txt`` file, in the future the code will
+use HDF5 for input/output of fields.
+For now, field I/O is done with binary files, and the field data type is
+stored in the parameter file.
+
+HDF5 particle I/O
+-----------------
+
+Particle I/O seems to be very slow, no idea why.
+Relevant links:
+
+    1. http://api.h5py.org/index.html
+    2. https://www.hdfgroup.org/ftp/HDF5/examples/python/hdf5examples-py/low_level/h5ex_d_alloc.py
+
+Code flexibility
+----------------
+
+Version 2.0 will be designed so that new fluid equations can be coded in
+from python classes, rather than as new C++ files.
-- 
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