title: Allow multiple values to BDC Column
body: <p>I have added a column called Customer to my documents library, this is a business data column. </p>
  
  <p>What I want to do is relate a document to multiple customers by entering customer codes into this box.</p>
  
  <p>Currently I can add 'FLC' for example, but I want to put 'FLC, MFT, SAL' for a specified document as it relates to many customers.</p>
  
  <p>Any ideas?</p>
  
  <p>Cheers,
  Albert</p>