4 DAIS Data Access

   Contents

   This chapter contains the following sections.

   The data access interface provides a client with a way to read, write, or subscribe for data (items) held by the server. It has a discovery interface where a client can browse and select available data. Selected data is used to compose groups and groups are used in read, write, or subscribe operations. To get subscribed data, a client has to connect a callback object to the server so that the server can notify the clients with changed data.