title: bloomberg: how to use ticker to return ISIN
body: <p>I've been using Datastream and Bloomberg to collect data. First I've got a large sample of <strong>bond</strong> ISIN from datastream, then in order to get the corresponding firm financials, I use bloomberg function <code>=BDP(A1&amp;"@BGN Corp", "Issuer_parent_eqy_ticker")</code>, A1 being the ISINs, to get the equity ticker number. This will return the ticker number. 
  Now I need the equity (stock) information of that firm, preferably ISIN.
  Now the question is, can I use the ticker number to return equity ISINs?</p>