I have two doctypes, one refers to another via link field. Is it possible to access the first one (the one from which link has been created) from the second (the one to which link points)?
There are two ways … from the 2nd doctype you can access directly using the link (the mouse over the link, click and open the related link)
The reverse way is made by “Connections” or “Linked Documents”. This standard framework feature lets you show on all connected documents (i.e. in customer all sales invoices, or in a supplier all purchase orders).
Hope this helps.