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XPDL.pdf English
A variety of different tools may be used to analyse, model, describe and document a business process. The workflow
process definition interface defines a common interchange format, which supports the transfer of workflow process
definitions between separate products.
The interface also defines a formal separation between the development and run-time environments, enabling a process
definition, generated by one modelling tool, to be used as input to a number of different workflow run-time products.
A workflow process definition, generated by a build-time tool, is capable of interpretation in different workflow run-time
products. Process definitions transferred between these products or stored in a separate repository are accessible via that
common interchange format.
To provide a common method to access and describe workflow definitions, a workflow process definition meta-data model
has been established. This meta-data model identifies commonly used entities within a process definition. A variety of
attributes describe the characteristics of this limited set of entities. Based on this model, vendor specific tools can transfer
models via a common exchange format.
One of the key elements of the XPDL is its extensibility to handle information used by a variety of different tools. XPDL
may never be capable of supporting all additional information requirements in all tools. Based upon a limited number of
entities that describe a workflow process definition (the "Minimum Meta Model"), the XPDL supports a number of
differing approaches.
2009-08-11
工作流参模型.pdf
工作流管理系统一项快速发展的技术,各种行业渐渐的采用工作流技术。工作流技术的主要特点是:
过程的自动化处理,这些过程包含由人与以机器为基础的活动相结合;特别是对那些与 IT 应用程序、工具
交互的过程,进行自动化处理。虽然,工作流技术广泛用于办公环境中,例如保险、银行、法院和行政管
理等,然而工作流技术,也可以应用于一些类型的工业和制造业。
许多软件开发商都有 WFM产品,并且不断有新的 WFM产品走入市场。市场上可选择的产品范围很
大,因此每个开发商只关注产品特殊功能,而用户可以采用不同的商品来满足不同的需求。然而,没有统
一的规范使得不同的 WFM 产品协同工作,这是由于不兼容的过程控制方式所导致。
WFMC 是由一些公司联合到一起成立的组织,从事上述问题的研究。业界一直认为,所有的 WFM
产品都有一些相同的特性,这样对各种功能使用公共的标准,就可以实现不同产品间的协同工作。WFMC
的成立是为了确定那些功能范围,并且为 WFM 产品的实现制定适当的规范。希望,这些规范能够使不同
种类的 WFM 产品协同工作,并提高工作流应用程序与其他 IT服务(例如,Email、文档管理等)的集成
能力,从而工作流技术在 IT市场中被更有效的使用,开发商与用户共同受益。
2009-08-11
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