The difference between XHTML and HTML

1. XHTML requires proper nesting

Error: <p>xhtml document <strong> main differences from HTML </p></strong>

Correct: <p>xhtml document <strong> main differences from HTML </strong></p>

2. All XHTML elements must be closed

Under the HTML some primitive can be used alone, such as <p> tags, can not write </p>. However, under XHTML, it is required to write a close tag.

Error: The main difference between <p>xhtml and HTML

Correct: The main difference between <p>xhtml and HTML </p>

Some empty elements are written in XHTML with spaces and slashes before ">", such as:

<br/>

3. XHTML is case-sensitive

The HTML is case-insensitive, but is distinguished in XHTML. XHTML all tags and attributes are lowercase. Such as:

Error:

Correct:

4. XHTML attribute values are quoted

Error: <table width=800

Correct: <table width= "800"

Property values can be in double quotes, or single quotes, but paired.

5. XHTML replaces the name attribute with the id attribute

Error:

Correct:

6. Attribute value cannot be shortened

In HTML, some element attribute values have only a single fixed value, so you can write property names without writing property values, but you must write property names and property values in XHTML. Such as:

Error: <input type= "Radio" checked>

Correct: <input type= "Radio" checked= "checked" >

The difference between XHTML and HTML