| 摘要 |
A server apparatus has a database configured to store metadata of content. A message receiving unit receives a subscribe request for an event notification subscription from a client terminal, the subscribe request including a search condition for the metadata, and establishes a dialog for the event notification subscription. A metadata search unit searches the database on the basis of the search condition. A message sending unit generates a notify message including a search result obtained by the metadata search unit and sends the notify message to the client terminal. |
