$ curl -I http://www.iso.org/iso/home/standards/country_codes/country_names_and_code_elements_txt.htm
HTTP/1.1 200 OK
Date: Tue, 31 Jul 2012 15:52:55 GMT
Server: Apache/2.2.11 (Unix)
Content-Type: text/html; charset=UTF-8
Last-Modified: Thu, 19 Jul 2012 07:41:50 GMT
ETag: "17aa8fca-01010000"The Content-Type for the XML is no better.
Replacing the horrid _txt.htm by .txt actually gives a Content-Type text/plain, but that delivers a HTML page …