OBE implements several of the WfMC's Open Workflow
Interface 1: XPDL Workflow Metamodel
XPDL (XML Process Definition Language) is an XML dialect used to define
portable workflow processes which conform to the WfMC workflow
metamodel. OBE supports all the core XPDL features and also
provides various extensions. See this link for further
Interface 2: Worklist Client
WAPI (Workflow API) is an API to a WfMS (Workflow Management System).
It also defines the meta-model for runtime process, activity and work
item instances and the lifecycles associated with each. The
WAPI standard is defined in terms of the C language and also
provides a COM binding. OBE implements a Java language binding
that was derived from the C binding by applying simple
transformation rules which embodied Java language best practices. See this link for further details.
Interface 3: Tool Agent
The ToolAgent API is the API which acts on behalf of a WFMS to invoke
external applications. OBE uses this API to invoke both external
applications and internal custom or predefined procedures. See this link for further details.
Interface 4: Wf-XML
Interface 4 is an extensibility interface that enables communication
between a WfMS and external programs. The interface enables
processes and their instances to be created, managed and queried using
an asynchronous request-response protocol. Wf-XML is the XML
binding; there are also bindings to other formats such as MIME.
OBE does not currently support Interface 4. See
this link for further details.
Interface 5: Audit Data
Interface 5 defines the format of the audit data which a conformant
WfMS must generate during workflow enactment. The Interface 5 API
defines the audit record formats as C language structures - OBE
implements a Java binding in which the structs are implemented as
read-only JavaBeans and in which composition is replaced by inheritance. See this link for further details.