参考:http://www.dreamdu.com/xhtml/tag_doctype/
XHTML过渡定义类型,此类型可以使用HTML4中的标签.
<
!DOCTYPE
html
PUBLIC
"
-//W3C//DTD XHTML 1.0 Transitional//EN
"
"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
"
>
XHTML严格定义类型,此文档只可以使用XHTML1中定义的标签(梦之都就使用了此类型).
<
!DOCTYPE
html
PUBLIC
"
-//W3C//DTD XHTML 1.0 Strict//EN
"
"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd
"
>
XHTML1.1版定义类型.
<
!DOCTYPE
html
PUBLIC
"
-//W3C//DTD XHTML 1.1//EN
"
"
http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd
"
>
XHTML框架定义类型.(可以使用框架)
<
!DOCTYPE
html
PUBLIC
"
-//W3C//DTD XHTML 1.0 Frameset//EN
"
"
http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd
"
>