Appendix D Comparison of HTML 4, XHTML, and HTML 5^625HTML 5 (XHTML Syntax)
This is the first paragraph.
This is the second paragraph.
D.6 Self-Contained Tags
The XHTML standard requires that all self-contained tags are properly closed using
" />". HTML 4 does not require this.
HTML 4
This is the first line.
This is the second line.
XHTML
This is the first line.
This is the second line.
HTML 5 (HTML Syntax)
This is the first line.
This is the second line.
HTML 5 (XHTML Syntax)
This is the first line.
This is the second line.
D.7 Attribute Values
The XHTML standard requires that all attributes are assigned values. HTML 4 allows
some attributes, such as noresizeor checked, to be minimized. Since these attributes
only have a single value, HTML 4 does not require that the value is provided.
HTML 4
XHTML 1.0
<input type="radio" checked="checked" name="gender" id="gender"
value="male" />