The CIP4 JDF Editor

Master Project at Nada Evelina Thunell
• Query support, controllers that support queries respond to requests from other
controllers by communicating their status.
• Command support, if a controller supports this level of messaging it has the
ability to process commands. The controller can receive commands to
interrupt a job, restart a job or to change status of a job in a queue.
• Submission support, this is the highest level of messaging. A controller that
has submission support can accept a JDF job via an http post request to the
messaging channel. [1]
The sending controller creates a JMF message. A JMF file with a message of the
message family Response is available in Appendix B.
3.1.8 JDF Extensibility
One of the main benefits of JDF is the flexibility it supplies through its extensibility.
Extensibility means that a vendor can add their own elements etc. to their application in
order for it to include all data needed. These so-called private extensions are
implemented by using XML namespaces. Private extensions that have become widely
used are in the future intended to be included in the next version of the specification.
3.1.9 The JDF Workflow
A JDF job is normally created by one agent and is then modified by other agents during
execution. A job is modified during execution, for example will the status of a process
or the availability of a resource change.
A controller can route the JDF job first when all input resources and parameters of a
node in that very job, are available. The controller routes it to a device, which will
execute the process. After the process is completed, the agent or controller will modify
the node to record the results of the process, as shown in Figure 3.5 and 3.6.
…
Figure 3.5 The file before modification by the agent [1]
…
Figure 3.6 Code after modification by the agent [1]
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