jodytate/mwf — comment on commit 0faaee0007759a8c0d67e2db1d1371636b3446ee
File:  line 0
By Trott:

Based on the Spolsky article, it seems that HTTP headers may be the way to go.

There may be some advantage to having it specified in the tag though for service providers who aren't able to override those settings in .htaccess or otherwise affect their server's httpd settings.