Dynamic Sitemaps.org XML Files

How would I create a XML file that updates automatically as pages launch?

[mevans05]

I've been researching how to develop a sitemaps.org XML which updates automatically as new pages/new sections of my site go into production. Keep in mind that my site is huge - hundreds of thousands of pages and many sub-domains, so we're talking multiple XML files per sub-domain.

I haven't found much out there except a couple out-of-the-box software programs which claim to do this. What I'm trying to figure out is how my internal developers might go about doing this without a 3rd party application.

I've heard rumors that this can be done with a python script, but I'm not a programmer, so I can't speak to this.

Any help would be appreciated.

[phranque]

there is a python-based sitemap generator available on sourceforge [sourceforge.net].
i would just set up a cron job to generate a new sitemap daily.
more often than that is probably not necessary.