diff --git a/modules/io/doc/mmcif.rst b/modules/io/doc/mmcif.rst
index 56af7faa322a6c498ce574578a796e35f1229498..a99538686572a7c8e934d392b835fd87b8ed2e00 100644
--- a/modules/io/doc/mmcif.rst
+++ b/modules/io/doc/mmcif.rst
@@ -1,12 +1,12 @@
-MMCif File Format
+mmCIF File Format
 --------------------------------------------------------------------------------
 
-The MMCif file format is an alternate container for structural entities, also
+The mmCIF file format is an alternate container for structural entities, also
 provided by the PDB. Here we describe how to load those files and how to deal
 with information provided above the common PDB format.
 
 
-Loading MMCif Files
+Loading mmCIF Files
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. autofunction:: ost.io.LoadMMCIF
@@ -15,17 +15,31 @@ Loading MMCif Files
 Categories Available
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
+The following categories of a mmCIF file are considered by the parser:
+
+* ``atom_site``: Used to build the :class:`entity <ost.mol.EntityHandle>`
+* ``entity``: Involved in setting ChainTypes
+* ``entity_poly``: Involved in setting ChainTypes
+* ``citation``: Goes into :class:`MMCifInfoCitation`
+* ``citation_author``: Goes into :class:`MMCifInfoCitation`
+* ``exptl``: Goes into :class:`MMCifInfo` as :attr:`method <MMCifInfo.method>`.
+* ``refine``: Goes into :class:`MMCifInfo` as
+  :attr:`resolution <MMCifInfo.resolution>`.
+* ``pdbx_struct_assembly``: Used for :class:`MMCifInfoBioUnit`.
+* ``pdbx_struct_assembly_gen``: Used for :class:`MMCifInfoBioUnit`.
+* ``pdbx_struct_oper_list``: Used for :class:`MMCifInfoBioUnit`.
+
 
 Info Classes
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Information from MMCif files which goes beyond structural data, is kept in a
+Information from mmCIF files which goes beyond structural data, is kept in a
 special container, the :class:`MMCifInfo` class. Here is a detailed description
 of the annotation available.
 
 .. class:: MMCifInfo
 
-  This is the container for all bits of non-molecular data pulled from a MMCif
+  This is the container for all bits of non-molecular data pulled from a mmCIF
   file.
 
   .. attribute:: citations
diff --git a/modules/io/src/mol/mmcif_reader.hh b/modules/io/src/mol/mmcif_reader.hh
index 6204545f5dd64ada2917990a2c8728ac8976a941..568350bbaf71e102286d2afe186a929873404438 100644
--- a/modules/io/src/mol/mmcif_reader.hh
+++ b/modules/io/src/mol/mmcif_reader.hh
@@ -45,6 +45,9 @@ namespace ost { namespace io {
 /// \li entity
 /// \li entity_poly
 /// \li citation
+/// \li citation_author
+/// \li exptl
+/// \li refine
 /// \li pdbx_struct_assembly
 /// \li pdbx_struct_assembly_gen
 /// \li pdbx_struct_oper_list