6.10 Reference List Markup 
Many sections include a list of references to module documentation
    or external documents.  These lists are created using the
    \seealso or \seealso* environments.  These environments
    define some additional macros to support creating reference
    entries in a reasonable manner.
The \seealso environment is typically placed in a section
    just before any sub-sections.  This is done to ensure that
    reference links related to the section are not hidden in a
    subsection in the hypertext renditions of the documentation.  For
    the HTML output, it is shown as a ``side bar,'' boxed off from the
    main flow of the text.  The \seealso* environment is
    different in that it should be used when a list of references is
    being presented as part of the primary content; it is not
    specially set off from the text.
- \begin{seealso}
    
 \end{seealso}
- 
      This environment creates a ``See also:'' heading and defines the
      markup used to describe individual references.
    
- \begin{seealso*}
    
 \end{seealso*}
- 
      This environment is used to create a list of references which
      form part of the main content.  It is not given a special
      header and is not set off from the main flow of the text.  It
      provides the same additional markup used to describe individual
      references.
    
For each of the following macros, why should be one or more
    complete sentences, starting with a capital letter (unless it
    starts with an identifier, which should not be modified), and
    ending with the apropriate punctuation.
These macros are only defined within the content of the
    \seealso and \seealso* environments.
- \seemodule
    [key]{name}{why}
- 
      Refer to another module.  why should be a brief
      explanation of why the reference may be interesting.  The module
      name is given in name, with the link key given in
      key if necessary.  In the HTML and PDF conversions, the
      module name will be a hyperlink to the referred-to module.
      Note:
The module must be documented in the same
      document (the corresponding \declaremodule is required).
    
- \seepep
    {number}{title}{why}
- 
      Refer to an Python Enhancement Proposal (PEP).  number
      should be the official number assigned by the PEP Editor,
      title should be the human-readable title of the PEP as
      found in the official copy of the document, and why should
      explain what's interesting about the PEP.  This should be used
      to refer the reader to PEPs which specify interfaces or language
      features relevant to the material in the annotated section of the
      documentation.
    
- \seerfc
    {number}{title}{why}
- 
      Refer to an IETF Request for Comments (RFC).  Otherwise very
      similar to \seepep.  This should be used
      to refer the reader to PEPs which specify protocols or data
      formats relevant to the material in the annotated section of the
      documentation.
    
- \seetext
    {text}
- 
      Add arbitrary text text to the ``See also:'' list.  This
      can be used to refer to off-line materials or on-line materials
      using the \url macro.  This should consist of one or more
      complete sentences.
    
- \seetitle
    [url]{title}{why}
- 
      Add a reference to an external document named title.  If
      url is given, the title is made a hyperlink in the HTML
      version of the documentation, and displayed below the title in
      the typeset versions of the documentation.
    
- \seeurl
    {url}{why}
- 
      References to specific on-line resources should be given using
      the \seeurl macro if they don't have a meaningful title.
      Online documents which have identifiable titles should be
      referenced using the \seetitle macro, using the optional
      parameter to that macro to provide the URL.
    
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