• Remote procedure call
  A method similar to function calls can be used for communication between UAPs.
  
• Transaction control
  UAP processes can be controlled as transactions.
  
• System operation management
  UAPs can execute commands and report the status of user servers.
  
• Message log output
  UAPs can output any user information as message logs.
  
• User journal acquisition
  User journals (UJs) can be acquired in system journal files.
  
• Journal data editing
  Journal data in the file containing the execution result of the jnlrput command can be edited.
  
• Real-time statistical information acquisition
  Real-time statistical information can be acquired in an arbitrary section in the UAP.
  

• Message exchanging
  TP1/Message Control allows message exchange mode communication in a wide-area network and between systems interconnected through TCP/IP.
  

• DAM file service
  Direct files can be used as OpenTP1-dedicated user files.
  
• TAM file service
  Table access based direct files can be used as OpenTP1-dedicated user files.
  
• ISAM file service^#
  Indexed sequential files complying with the X/Open ISAM model can be used.
  
• IST service (TP1/Shared Table Access)
  One or more tables (internode shared tables) in shared memory can be shared between two or more OpenTP1 systems. For the IST service, the entity of each user file does not exist and data is stored in an internode shared table in memory instead.
  
• Lock for resources
  OpenTP1 APIs can lock any files (UNIX files).
  

#

For details on the ISAM file service, see the manual Indexed Sequential Access Method ISAM.

• XATMI interface
  This interface allows client/server mode communication between X/Open-compliant APIs.
  
• TX interface
  X/Open-compliant APIs can control transactions.
  

Listed below are functions for facilities that are used in special styles.

(a) Facilities available with TP1/Multi

• Multinode facility
  Various facilities are available to UAPs in cluster/parallel OpenTP1 systems.
  

(b) Facilities available with online tester (TP1/Online Tester)

• Management of online tester
  The user server test status can be obtained by calling an appropriate function from the UAP.