XQuery document function

XQ-S-4 OPML file generation from XHTML source

document usage example

Example

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.

The demo also retrieve few OPML files and re-construct them having the feeds URLs if they are missing.

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.

The following are source references used in the demo:

http://wiki.techcrunch.com/third_meetup
http://news.com.com/html/ne/blogs/CNETNewsBlog100.opml
http://conferences.oreillynet.com/pub/w/23/speakers.html
http://conferences.oreillynet.com/pub/w/38/speakers.html
http://www.alwayson-network.com/comments.php?id=10852_0_11_0_C
http://www.gnomedex.com/holdings/br_2005%20Gnomedexers.opml
http://www.web2con.com/pub/w/40/speakers.html
http://www.thenewpr.com/wiki/pmwiki.php?pagename=Resources.CEOBlogsList
http://nwr.cowblock.net/index.php?action=list
http://okrasoup.typepad.com/black_looks/2005/05/naija_blogs.html
http://allafrica.com/afdb/blogs/blogafrica.opml

View the source	Action
1. o100.sql	Set the initial state
2. african_blogs.vsp	Run
3. atom.vsp
4. atom2sioc.xsl
5. blog100.vsp	Run
6. blogafrica.vsp	Run
7. ceo.vsp	Run
8. common.vsp
9. foaf.vsp	Run
10. foafmap.vsp
11. gnomedexers.vsp	Run
12. mapufacture.vsp
13. nigerian_bloggers.vsp	Run
14. o100.vsp	Run
15. osc2003.vsp	Run
16. osc2005.vsp	Run
17. planetrdf.vsp
18. rdf2atom.xsl
19. rss2atom.xsl
20. sem_blogs.vsp
21. sioc.vsp
22. status.vsp	Run
23. techcrunch.vsp	Run
24. technologyvoices.vsp
25. technorati_fav.vsp
26. technorati_pop.vsp
27. vloggercon.vsp
28. web2005.vsp	Run
29. xq_s_4.xsl
30. xq_s_4svc.xsl

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