XHTML - Attributes

XHTML attributes are HTML attributes written in XML format.

XHTML Attributes - Syntax Rules

  • XHTML attributes must bein lowercase
  • XHTML attribute values must beEnclosed in quotes
  • XHTML attribute minimization is alsoProhibited

XHTML attributes must be in lowercase

This is incorrect:

<table WIDTH="100%">

This is correct:

<table width="100%">

XHTML attribute values must be enclosed in quotes

This is incorrect:

<table width=100%>

This is correct:

<table width="100%">

Prohibited attribute abbreviation

This is incorrect:

<input checked>
<input readonly>
<input disabled>
<option selected>

This is correct:

<input checked="checked" />
<input readonly="readonly" />
<input disabled="disabled" />
<option selected="selected" />