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Appendix A: Semantic HTML
589
Attributes
So far all the base elements of the HTML standard have been described. Many of them are
self - conclusive and do not need any additional information to be correctly rendered. Others require
a minimum of information that is expressed in attributes. An image element ( img ) without a reference
to the image to embed (the src attribute) is of little or no use. Many elements reuse the same attributes
or a common set of attributes.
Attribute Groups
Different elements often share the same attributes that have been divided into logical groups for easy
reference. Some attributes are used in more than one group at the same time and in some rare circumstances,
the same attribute can have a different meaning varying with the element it is used within.
Attribute Group Attributes
cellalign align, char, charoff, valign
cell abbr, axis, colspan, headers, rowspan, scope
core class, id, style, title
events onclick, ondblclick, onkeydown, onkeypress, onkeyup,
onmousedown, onmousemove, onmouseover, onmouseout, onmouseup
form accept, accept - charset, action, enctype, method, name, onreset,
onsubmit
hyperlink accesskey, charset, href, hreflang, name, onblur, onfocus, rel,
rev, tabindex, type
i18n dir, lang
image alt, height, ismap, longdesc, src, usemap, width
input accept, accesskey, alt, checked, disabled, height, maxlength,
name, onblur, onchange, onfocus, onselect, readonly, size, src,
tabindex, type, value, width
link charset, href, hreflang, rel, rev, type
object archive, classid, codebase, codetype, data, declare, name,
standby, tabindex, type
param type, value, valuetype
table border, cellspacing, cellpadding, frame, rules, summary, width
Appendix A: Semantic HTML
590
Attribute Descriptions
In the following table every attribute name is associated to a description followed by a small text
describing the values that attribute can accept.
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