Using the XHTML closing slash (/) on normal tags?

I was just wondering whether it is acceptable to close a common tag, eg. a <span> which requires no data using the XHTML closing slash to reduce markup.

So for example:

<span id='hello'>开发者_JAVA百科</span>

could be written as

<span id='hello' />

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No you can't do that, span is not self-closing tag. Here are the self closing tags:

<area />
<base />
<basefont />
<br />
<hr />
<input />
<img />
<link />
<meta />

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No. What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?

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There are empty or self-closing tags. Span is not one of them.

http://justinsomnia.org/2005/12/there-are-only-10-legal-xhtml-empty-tags/