Abstract  Integrating  and  accessing  data  stored  in  autonomous ,  distributed  and  heterogeneous  data  sources  have  been  recognized  as  of  a  great  importance  to  small  and  hu ge-scale  businesses.  Enhancing  the  accessibility  and  the  reusability  of  these  data  entail  the  development  of  new  approaches   for  data  sharing.  These  approaches  should  satisfy a  minimal  set  of  criteria  in  order  to  support  the  development  of  eff ective  and  comprehensive  data  sharing  applications.   In  this  paper,  we  first  outline  the  four  data  sharing  approaches  and  define   a  set  of  fundamental  criteria  for  data  sharing  approach.  Moreover,  we  investigate the motivation and importance of these  criteria, and the inter-dependencies among them. Ad ditionally, we compare  the existing data sharing approaches based on the a vailable options for each criterion.   

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