--- a/docs/format_online.rst	2013-07-05 17:46:04.000000000 +0800
+++ b/docs/format_online.rst	2019-01-23 00:34:05.497605940 +0800
@@ -1,4 +1,4 @@
-.. _format_hdf5:
+.. _format_online:
 
 ==============
 Online queries