* URIs in RSS feeds must be absolute, because feed readers do not have
any consistent semantics for the base of relative links
-* If we have a `<base href>` then the HTML spec says it must be
- absolute
+* If we have a `<base href>` then HTML 4.01 says it must be
+ absolute, although HTML 5 does relax this by defining semantics
+ for a relative `<base href>` - it is interpreted relative to the
+ "fallback base URL" which is the URL of the page being viewed
([[bugs/trouble_with_base_in_search]],
[[bugs/preview_base_url_should_be_absolute]])
[[forum/Using_reverse_proxy__59___base_URL_is_http_instead_of_https]],
[[forum/Dot_CGI_pointing_to_localhost._What_happened__63__]])
+* For relative links in page-previews to work correctly without
+ having to have global state or thread state through every use of
+ `htmllink` etc., `cgitemplate` needs to make links in the page body
+ work as if we were on the page being previewed.
+
# "Would be nice"
* In general, the more relative the better