[MarkLogic Dev General] Moving documents from one forest to another

[Whitby, Rob, CMG]

Hi

I'm trying to work out the quickest way of moving documents from one
forest to another. In the admin guide it talks about making the existing
forest delete-only and then updating the documents. I was hoping to just
add the docs to a collection to trigger the move, but this function
doesn't take forest-ids so errors. The only functions I see are
document-update and document-load which aren't really suitable. Is there
a trick I'm missing here?

I also considered using xqsync but that seems like a pain because I'd
also have to delete the old documents.

What's the best practice approach? 

Cheers
Rob