ecision point (diamond) in the diagram, Webmachine will
determine which path to follow.  In some cases it can determine the
path purely from the request data -- for instance, the path from
decision <code>C3</code> depends purely on whether the client sent
an <code>Accept</code> header.  In many cases, however, the decision
is application-specific -- the path from <code>B10</code> depends on
the value the
<a href="resources.html">resource</a> module
returns from <code>allowed_methods.</code> Eventually the c