implifying the document structure, HTML added
support for hypertext. Multimedia capabilities were added
later.</p>

<p>In a remarkably short space of time, HTML became wildly
popular and rapidly outgrew its original purpose. Since HTML's
inception, there has been rapid invention of new elements for use
within HTML (as a standard) and for adapting HTML to vertical,
highly specialized, markets. This plethora of new elements has
led to compatibility problems for documents across different
platforms.</p>

<p>As