Lookup field across sites


Came across this really useful blog from Sahil Malik.

http://blah.winsmarts.com/2009-3-Using_Site_Lookup_columns,_across_sites.aspx

This one shows how we can use a lookup field across the sites. Though this will work only for top down hierarchy i.e. you can have a look up column in child site that looks up a list in the parent. Not the other way.

If you want to have it the other way i believe custom field type will be the way to go.

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