Kind of unrelated; But maybe someone knows.

David J. david at
Thu Dec 23 03:43:30 MSK 2010

I was wondering why some sites have

<script src="path/to/javascript.js?432532432"></script>

What is the "?432532432" or whatever used for? Is it a versioning thing.

I see it on many of the bigger sites.

<link href="/css/layout.css?1291917579" media="all" rel="stylesheet">

Thanks for any info.

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