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MM interfaces
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This section describes the options in common to all MM interfaces.

In addition to these options, each QM interface may contain
options specific to that code. For details please see the individual
interface manual pages:

.. toctree::
   :titlesonly:

   dl_poly
   gulp
   namd


General options
===============

.. py:attribute:: ff

   (default: ``''``) Free text input for forcefield definitions: can be either Python multi-line string (such as ``'''...'''``) or a filename (e.g., ``'my_ff.txt'``) of plain text containing multi-line string.

.. py:attribute:: input
   :noindex:

.. py:attribute:: output
   :noindex:
