Version-//W3C//DTD XHTML 1.0 Strict//EN
Elementh1
Purposeprimary heading
DescriptionThis element encloses text which is a heading of the highest importance.
Start tagRequired <h1>
Attributes
NameTypeDefaultComment
class CDATA #IMPLIEDspace-separated list of classes
dir( ltr | rtl )#IMPLIEDdirection for weak/neutral text
idID#IMPLIEDdocument-wide unique id
langNMTOKEN#IMPLIEDlanguage code (backwards compatible); language code as RFC3066
onclick CDATA #IMPLIEDa pointer button was clicked; script expression
ondblclick CDATA #IMPLIEDa pointer button was double clicked; script expression
onkeydown CDATA #IMPLIEDa key was pressed down; script expression
onkeypress CDATA #IMPLIEDa key was pressed and released; script expression
onkeyup CDATA #IMPLIEDa key was released; script expression
onmousedown CDATA #IMPLIEDa pointer button was pressed down; script expression
onmousemove CDATA #IMPLIEDa pointer was moved within; script expression
onmouseout CDATA #IMPLIEDa pointer was moved away; script expression
onmouseover CDATA #IMPLIEDa pointer was moved onto; script expression
onmouseup CDATA #IMPLIEDa pointer button was released; script expression
style CDATA #IMPLIEDassociated style info; style sheet data
title CDATA #IMPLIEDadvisory title; text used for titles
xml:langNMTOKEN#IMPLIEDlanguage code (as per XML 1.0 spec); language code as RFC3066
Content( #PCDATA | a | br | span | bdo | map | object | img | tt | i | b | big | small | em | strong | dfn | code | q | samp | kbd | var | cite | abbr | acronym | sub | sup | input | select | textarea | label | button | ins | del | script )*
End tagRequired </h1>
Referenced in blockquote body button dd del div fieldset form ins li map noscript object td th
Example
SourceAppearance
<h1>The Universe</h1>
<h2>The Milky Way Galaxy</h2>
<h3>Our Local Group of Stars</h3>
<h4>Our Solar System</h4>
<h5>Earth</h5>
<h6>North America</h6>

The Universe

The Milky Way Galaxy

Our Local Group of Stars

Our Solar System

Earth
North America
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