Differences between XHTML and HTML

• XHTML is case sensitive
• All elements must be closed
• All tags must be properly nested
• Attibures must always be enclosed in quotes
• All empty tags must be "self-closing"
• Attribute pairs cannot be minimized

Omitted Elements & Attributes from HTML

• body tag does not support bgcolor, text, or link attributes
• link tag supports new attribute value: media="handheld"
• style element not in XHTML Basic, but included in WML 2.0 and some browsers
• frames not supported
• font related elements (center, font, s, tt, b, big, i, small, u) not included
• <hr /> not in XHTML Basic, but included in WML 2.0 and some browsers
• input element does not support type="image" or "button"
• a element doesn not support button and name
• ol, ul, and li tags do not support attributes
• nesting of tables not supported, align, cellpadding, cellspacing, and border not supported.
• img tag does not support align, border, usemap, hspace, and vspace
• script tag not supported
• object tag not supported

WML 2.0 Extensions to XHTML Basic

• style tag
• style attribute (inline styles)
• hr tag
• marquee tag

Differences between XHMTL Basic and WML 1.0

• use html root element instead of wml
• head tag is required
• template element removed
• card element removed (use body instead)
• WML events (do, go, prev, ...) not supported
• do element not used