Schema validation for sitemaps is now in trunk. Its turned off by default and activated for the running mode "dev". You can activate validation by setting the property "org.apache.cocoon.sitemap.validation" to "true" for the settings.
The schema already works for several sitemaps, but I'm sure that I forgot some possibilities (which means some attributes). So it would be great if people could validate their sitemaps using the schema and either report problems or directly fix the schema. Thanks Carsten -- Carsten Ziegeler http://www.osoco.org/weblogs/rael/
