The following slides continue explaining various HTML and XML tags.

Slide 4.1: XML (eXtensible Markup Language)
Slide 4.2: XML (cont.)
Slide 4.3: How can XML be used?
Slide 4.4: How can XML be used? (cont.)

Slide 4.5: XHTML (eXtensible HyperText Markup Language)
Slide 4.6: Differences between XHTML and HTML
Slide 4.7: Differences between XHTML and HTML (cont.)
Slide 4.8: XHTML syntax
Slide 4.9: XHTML syntax (cont.)
Slide 4.10: XHTML DTD
Slide 4.11: XHTML DTD (cont.)
Slide 4.12: XHTML validataion

Slide 4.13: HTML5
Slide 4.14: HTML5 canvas
Slide 4.15: HTML5 video
Slide 4.16: HTML5 Geolocation

  ☂ References

Slide 4.a: HTML tutorial from W3Schools
Slide 4.b: XML tutorial from W3Schools






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