JBoss jBPM is a platform for process languages. At the base there is a java library to define and execute graphs. The actual process CONSTRUCTS like e.g. send email, USER task and update database are defined on top of this. Every process language is made up of a set of such process constructs. And that is what is pluggable in this base library. On top of the JBoss jBPM base library, there are IMPLEMENTED several process languages as a set of process constructs: jPDL, BPEL and SEAM pageflow:

• jPDL is a process language with a clean interface to Java and very sophisticated task management CAPABILITIES. There is no standard for Java process languages, so it is proprietary.
• BPEL is a service orchestration language. As SAID before, in BPEL, you can write new services as a function of other services. This is typically a component of an Enterprise Service Bus (ESB).
• SEAM pageflow is a language that allows for the graphically define the navigation between pages in a SEAM web application.

JBoss jBPM is a platform for process languages. At the base there is a java library to define and execute graphs. The actual process constructs like e.g. send email, user task and update database are defined on top of this. Every process language is made up of a set of such process constructs. And that is what is pluggable in this base library. On top of the JBoss jBPM base library, there are implemented several process languages as a set of process constructs: jPDL, BPEL and SEAM pageflow:

• jPDL is a process language with a clean interface to Java and very sophisticated task management capabilities. There is no standard for Java process languages, so it is proprietary.
• BPEL is a service orchestration language. As said before, in BPEL, you can write new services as a function of other services. This is typically a component of an Enterprise Service Bus (ESB).
• SEAM pageflow is a language that allows for the graphically define the navigation between pages in a SEAM web application.