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When the target page is relative to the site, ie: to a local content item, it would be very good, especially for accessibility for the blind, but also for all users, for the applicable html sitemap link to have the target page's title in the href' title= tag. To minimize overhead in accessing content pages when generating the sitemap, the html sitemap may need to be cached for 24 hours, if that is possible. And whether or not to include content titles in the html sitemap may need to be a XMAP option that the site's webmaster can set.