word characters.  Use a
  backslash escaped space to work around that: ``thisis\ *one*\ word``.

These restrictions may be lifted in future versions of the docutils.

reST also allows for custom "interpreted text roles"', which signify that the
enclosed text should be interpreted in a specific way.  Sphinx uses this to
provide semantic markup and cross-referencing of identifiers, as described in
the appropriate section.  The general syntax is ``:rolename:`content```.

Standard reST provides the following ro