I'm sitemapping all my forum topics. It works great:
<url> <loc>http://127.0.0.1/scirranew/Forum/Breaks-and-slowdowns-Vram-200_topic32854.html</loc> <lastmod>2010-11-06</lastmod> <changefreq>daily</changefreq> <priority>0.7</priority> </url>
However, with change frequency, this totally depends on how long ago the last reply was. Is it ok, to dynamically generate these values, or should I leave this XML tag out completely? IE, I was planning on doing:
If last reply date was:
< 1 hour ago = always < 1 day ago = hourly < 1 week ago = daily < 4 weeks ago = weekly < 12 months ago = monthly else yearly
Thanks for any tips!