Standards mode is turned on when one of the following doctypes is used:
<!-- HTML 4.01 Strict -->
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01//EN”
“http://www.w3.org/TR/html4/strict.dtd”>
<!-- XHTML 1.0 Strict -->
<!DOCTYPE html PUBLIC
“-//W3C//DTD XHTML 1.0 Strict//EN”
“http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”>
<!-- HTML5 -->
<!DOCTYPE html>
Almost standards mode is triggered by transitional and frameset doctypes, as follows:
<!-- 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”>
<!-- 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”>
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