Often when I find an article in the SQL Server BOL I see that the article has an address of ms-help://.
but I can't forward this "uri" to a colleague who doesn't have the Sql Server BOL --- so the question is is there a consistent mapping between ms-help:// and http://msdn.microsoft.com
MSDN online changes at a different pace than your offline content. Ie. the mapping function may be valid today but invalid tomorrow. What I do I just search the topic title in msdn (using google site:msdn.microsoft.com of course, msdn search is just lame) and the post/mail the link.