Method for managing proprietary data in a content distribution system having access control according to a predefined data access format, which method comprises the steps of - creating an access policy according to the predefined data access format for controlling access to the proprietary data based on permissions to access files or subdirectories, - providing the proprietary data according to the access policy, - providing at least one studio application complying with the access policy for accessing the proprietary data, for enabling a rendering device to execute the studio application, - creating a cross access policy according to the predefined data access format for controlling access to shared data that studios allow to be shared for cross studio applications, - providing at least part of the proprietary data as the shared data in a directory, - providing at least one cross studio application complying with the cross access policy for accessing the shared data, for enabling the rendering device to execute the cross studio application for accessing the shared data, characterized in that the data access format provides a two-layered access structure, - a first mechanism based on the permissions, and - a second mechanism based on credentials to override the first mechanism, access not being granted based on allegiance to a studio, but based on possession of a credential for a specific directory, and in that the method further comprises the steps of - setting the cross access policy for a virtual entity, wherein the virtual entity is configured to allow the at least one cross studio application to be created, - creating a credential of the virtual entity for accessing the directory containing the shared data and - providing the at least one cross studio application with the credential of the virtual entity for accessing the directory containing the shared data. - creating an access policy according to the predefined data access format for controlling access to the proprietary data based on permissions to access files or subdirectories, - providing the proprietary data according to the access policy, - providing at least one studio application complying with the access policy for accessing the proprietary data, for enabling a rendering device to execute the studio application, - creating a cross access policy according to the predefined data access format for controlling access to shared data that studios allow to be shared for cross studio applications, - providing at least part of the proprietary data as the shared data in a directory, - providing at least one cross studio application complying with the cross access policy for accessing the shared data, for enabling the rendering device to execute the cross studio application for accessing the shared data, characterized in that the data access format provides a two-layered access structure, - a first mechanism based on the permissions, and - a second mechanism based on credentials to override the first mechanism, access not being granted based on allegiance to a studio, but based on possession of a credential for a specific directory, and in that the method further comprises the steps of - setting the cross access policy for a virtual entity, wherein the virtual entity is configured to allow the at least one cross studio application to be created, - creating a credential of the virtual entity for accessing the directory containing the shared data and - providing the at least one cross studio application with the credential of the virtual entity for accessing the directory containing the shared data.