title: Specifying targets for intersphinx links to numpy, scipy, and matplotlib
body: <p>Following the documentation for setting up Sphinx documentation links between packages, I have added </p>
  
  <pre><code>intersphinx_mapping = {'python': ('http://docs.python.org/2', None),
                         'numpy': ('http://docs.scipy.org/doc/numpy/', None),
                         'scipy': ('http://docs.scipy.org/doc/scipy/reference/', None),
                         'matplotlib': ('http://matplotlib.sourceforge.net/', None)}
  </code></pre>
  
  <p>to my <code>conf.py</code>, but can't seem to get links to any project other than Python itself to work. For example</p>
  
  <pre><code>:term:`svg graphics &lt;matplotlib:svg&gt;`
  </code></pre>
  
  <p>just takes me to the index page, without adding the expected <code>#term-svg</code> anchor, and I can't even locate the glossary for <code>scipy</code> or figure out how to determine what <code>:ref:</code>s or <code>:term:</code>s are supported by a package.</p>
  
  <p>Where can I find instructions on how to specify targets for <code>:ref:</code>s and <code>:term:</code>s in <code>numpy</code>, <code>scipy</code>, and <code>matplotlib</code>?</p>
  
  <hr>
  
  <p>For that matter, how do I link to Sphinx itself? Adding</p>
  
  <pre><code>intersphinx_mapping['sphinx'] = ('http://sphinx-doc.org/', None)
  </code></pre>
  
  <p>and</p>
  
  <pre><code>:ref:`Intersphinx &lt;intersphinx&gt;`
  </code></pre>
  
  <p>doesn't work.</p>