The OCX schema documentation is available at the OCXwiki site. We have chosen to document the OCX standard using the DokuWiki  platform to allow for wider engagement and community contributions. The content on the OCX Wiki is maintained by the OCX Interoperability Forum (OCX-IF). The OCXWiki has a public and private space.  Only OCX-IF members are registered users and must log in with their user credentials (user name and password).