What does "codebase" mean in HTML when publishing

hey everyone,

i’m trying to publish in flash 4 and the “codebase” in HTML confuses me (it’s inside the OBJECT tag, right after classid):

codebase="<a href=“http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0"”>download.macromedia.com/p...n=5,0,0,0"</a>

what is does it do?

does the codebase have anything to do with the version of flash you are publishing in (3,4,or 5) if so, should it not be ‘=4,0,0,0’ at the end instead of 5,0,0,0 if i’m publishing in flash 4??