how to use parsing expressing grammar

[Xah Lee]

There are 2 parsing expression grammars in elisp.

    * http://www.emacswiki.org/cgi-bin/wiki/ParserCompiler, (2008) by
Mike Mattie.
    * http://www.emacswiki.org/emacs/ParsingExpressionGrammars (2008)
by Helmut Eller.

The second one seems simpler, and i'm trying to learn it as a regex
replacement, but don't know how to use it.

Could anyone give concrete example in the following scenario?

For example, on my website i have things like:

 <hr>
 <p>Related essays:</p>
 <ul>
 <li><a href="someFilePath1">SomeTitleString2</a> someSring1</li>
 <li><a href="someFilePath2">SomeTitleString2</a> someSring2</li>
 ...
 </ul>

Suppose i want to change them to:

 <hr>
 <p>See also:</p>
 <p>
 <a href="someFilePath1">SomeTitleString1</a> someSring1<br>
 <a href="someFilePath2">SomeTitleString2</a> someSring2<br>
 ...
 </p>

How do i do it?

Thanks.

  Xah
∑ http://xahlee.org/

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