HTML 수업

웹의 신체

HTML 수업 웹의 신체

DTD(Doctype)

요약

Document Type Definition. 문서의 형식을 지정한다.

문법

HTML 3.2

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">

HTML 4.01

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

HTML 4.01 Transitional

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"    "http://www.w3.org/TR/html4/loose.dtd">

HTML 4.01 Frameset

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN"    "http://www.w3.org/TR/html4/frameset.dtd">

HTML 1.0 Strict

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

XHTML 1.0 Transitional

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

XHTML 1.0 Frameset

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN"  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">

XHTML 1.1

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

XHTML Basic 1.0

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"  "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">

XHTML Basic 1.1

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN">

HTML5

<!DOCTYPE html>

설명

웹 기술의 진보에 따라 HTML도 변화 되는데, 변화에 따라 브라우져가 HTML을 해석하는 방식도 변화가 생겼다.
이를 극복하기 위해서 브라우져에게 해당 HTML이 어떤 표준에 따른 것인지를 알려주는 것을 DTD(Document Type Definition)이라고 한다.
DTD는 문서의 제일 위에 위치한다. 

example1. HTML5의 doctype를 적용한 웹페이지. (github)

<!DOCTYPE html>
<html>
    <head>
        <title>DTD</title>
    </head>
    <body>
        Hello, HTML5! 
    </body>
</html> 

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