... ... The FPI for the strict HTML 4.0 DTD is: "-//W3C//DTD HTML 4.0//EN" You are recommended to use the strict DTD unless you need the presentation control for user agents that don't (adequately) support style sheets. If you are writing a frameset document you should use the following FPI: "-//W3C//DTD HTML 4.0 Frameset//EN" You can also use a URL as a system identifier for the DTD, as in: or better still together with the public identifier as in: The user agent can then download the DTD and entity sets as needed. The following URLs are supported in relation to HTML 4.0 "http://www.w3.org/DTD/HTML4-strict.dtd" (strict DTD) "http://www.w3.org/DTD/HTML4-loose.dtd" (loose DTD) "http://www.w3.org/DTD/HTML4-frameset.dtd" (frameset documents) "http://www.w3.org/DTD/ISOlat1.ent" (Latin-1 entities) "http://www.w3.org/DTD/HTMLsymbol.ent" (Symbol entities) "http://www.w3.org/DTD/HTMLspecial.ent" (Special entities) --> %HTMLlat1; %HTMLsymbol; %HTMLspecial; ]]> ]]> ]]> ]]> ]]>