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Lessons XHTML Common Mistakes Bookmark and Share
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In this lesson we will discuss some of the common mistakes in the usage of XHTML:
  1. Not closing empty elements (elements without closing tags in HTML)
    • Incorrect: <br>
    • Correct: <br /> or <br></br>
      Any of these is acceptable in XHTML: <br></br>, <br/>, and <br />.

  2. Not closing non-empty elements
    • Incorrect: <strong>This text is bold.<p>This text is also bold.
    • Correct: <p>This is a paragraph.</p><p>This is another paragraph.</p>

  3. Improper nesting of tags
    • Incorrect: <em><strong>This is some text.</em></strong>
    • Correct: <em><strong>This is some text.</strong></em>

  4. Using attribute values without quotes or wrong quotes
    • Incorrect: <td rowspan=3>
    • Incorrect: <td rowspan='3">
    • Correct: <td rowspan="3">
    • Correct: <td rowspan='3'>

  5. Using the ampersand character outside of entities
    • Incorrect: <title>Cars & Trucks</title> (This is also invalid in HTML)
    • Correct: <title>Cars &amp; Trucks</title>

Our XHTML Tutorial ends here. How did you find it? Please let us know at pickatutorial@yahoo.com | Tutorial author: farooq_fl@yahoo.com

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