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meta [HTML]

name=robots

<link name='....' content='....'>
A spider will retrieve the document, but it will not index the document: 
<META NAME="robots" CONTENT="noindex">
A spider will not follow any links that are present on the page to other documents 
<META NAME="robots" CONTENT="nofollow"> dipsie.bot will not follow any links that are present on the page to other documents.
A spider will index, but not cache (archive) this document in its repository: 
<META NAME="robots" CONTENT="noarchive">
Obviously, name can also be set to the name of a spider (such as dipsie.bot).

Combinations

<META NAME="robots" CONTENT="noarchive,nofollow">

http-equiv

reloading a page

Forcing a reload of a page: 
<meta http-equiv="expires" content="0">
<meta http-equiv="refresh" content="60; URL=http://xxx.yyy.zzz/page.html">
It must be pointed out that this is not HTML 4 standard. Also, the browser's history will be filled up and the browser's go back function won't work properly anymore. So, a javascript solution to reload the page might be preferable.