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<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2012 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<?xml version="1.0" encoding="ISO-8859-1"?>
<refentry id="XQ-S-4">
<refmeta>
<refentrytitle>XQuery document function</refentrytitle>
<refmiscinfo>tutorial</refmiscinfo>
</refmeta>
<refnamediv>
<refname>OPML file generation from XHTML source</refname>
<refpurpose>document usage example</refpurpose>
</refnamediv>
<refsect1 id="XQ-S-4a">
<title>Example</title>
<para>
The demo retrieve a HTML pages containing attendees or bloggers listings and convert them to OPML.
The conversion is done with XQuery and user-defined XPath functions to resolve the feeds URLs.
</para>
<para>
The demo also retrieve few OPML files and re-construct them having the feeds URLs if they are missing.
</para>
<para>
When setting the initial state, the demo starts to retrieve pages from the different sites.
It could take a long time depending on the Internet connection of the machine that Virtuoso is running on.
It is safe to leave the pop-up open without waiting it to finish and press on the "Run" links,
however if this is the first time you run the initial state, the demo will show only partial results.
Once the feeds are resolved they will be cached locally in a database table and the generated OPML files will
be stored as a WebDAV resources.
</para>
<para>
The following are source references used in the demo:
</para>
<itemizedlist mark="bullet">
<listitem>http://wiki.techcrunch.com/third_meetup </listitem>
<listitem>http://news.com.com/html/ne/blogs/CNETNewsBlog100.opml </listitem>
<listitem>http://conferences.oreillynet.com/pub/w/23/speakers.html </listitem>
<listitem>http://conferences.oreillynet.com/pub/w/38/speakers.html </listitem>
<listitem>http://www.alwayson-network.com/comments.php?id=10852_0_11_0_C </listitem>
<listitem>http://www.gnomedex.com/holdings/br_2005%20Gnomedexers.opml </listitem>
<listitem>http://www.web2con.com/pub/w/40/speakers.html </listitem>
<listitem>http://www.thenewpr.com/wiki/pmwiki.php?pagename=Resources.CEOBlogsList </listitem>
<listitem>http://nwr.cowblock.net/index.php?action=list </listitem>
<listitem>http://okrasoup.typepad.com/black_looks/2005/05/naija_blogs.html </listitem>
<listitem>http://allafrica.com/afdb/blogs/blogafrica.opml </listitem>
</itemizedlist>
</refsect1>
</refentry>
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