XML basedwork flowdescription language. By the fact that it cooperates plural Web services, it is possible to define complicated process flow.

The side as language in order you describe & to design business process and, with the execution environment which is called the business process engine (orchestration engine) and the like, there is a side as the script language which executes the process with Web service.

BPEL making activity tie up such as call of Web service, operation, obstacle notification, except operation of the data and end of process the Web service interface which is described with WSDL as a base, defines complicated process. In addition, other than processing flow description, like BtoB (transaction between enterprise) flow, it has become applicable even in description of Web service cooperation between the enterprise which differs.

BPEL fused the bender specification, WSFL (IBM) and XLANG (Microsoft) which are to that, was announced in 2002 August IBM, Microsoft, by the BEA systems, after that BPEL 1.1 was released in 2003 May IBM, Microsoft, BEA and SAP, by the sea bell. This is hit and to the stand job of standardization is advanced with OASIS of the standardization group. If and it is conformed to BPEL specification with present condition, with any bender product it has become feasibility shape.