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| | JV (BS2000/OSD) |
Information exchange between users and the operating system |
Current version: V14.0
Job variables are data items which enable the exchange of information between users, individual users and the operating system. The user can create and modify job variables themselves, as well as instruct the operating system to set predefined values for selected job variables whenever particular events occur. Job variables provide the user with a versatile tool for job control. They enable the simple definition of dependencies within complex production runs and provide the foundations for job processing based on eventing.
Job variables are data items managed by the operating system and addressed by means of names. Up to 256 bytes of information can be stored in each job variable. They can be accessed via both the command interface and the macro interface. When component SDF of BS2000/OSD-BC is employed, job variables can be used as global parameters at command level.
By means of conditional statements it is possible to link job variables via logical operations and thereby make the execution of individual actions dependent on the fulfillment or non-fulfillment of the condition. Furthermore, user job variables and monitoring job variables offer the possibility of synchronous and asynchronous eventing on both command and program level. Different types of job variables are available to meet the various requirements.
User job variables
User job variables are the most general form in which job variables are available. The user bears the sole responsibility for the name and life-span of these job variables, as well as for the data which is to be stored in them. User job variables can be supplied with protection attributes such as password, write protection and expiration date. Access can be restricted to a single user ID or authorized for all user IDs.
Monitoring job variables
Monitoring job variables are a special form of user job variable. These job variables are assigned to specific jobs or programs, and their name, life-span and protection attributes are defined by the user. They differ from user job variables, in that they are supplied by the operating system with fixed values providing information on the status of the assigned job/program.
Special job variables
Special job variables are the exclusive responsibility of the operating system, which both creates them and provides them with values. The user has read-only access to special job variables.
Computer network
When used in conjunction with the software product HIPLEX® MSCF (Multi System Control Facility), the job variables are available on all computers in a function network.
Programming at command level
SDF-P considerably extends the scope for programming at command level. A close link with Job Variables is an important contributory element in this. |
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