BPML, a superset of BPEL, was implemented by early stage vendors, such as Intalio Inc., but incumbents such as IBM and Microsoft did not implement BPML in their existing workflow and integration engine implementations like BizTalk or Websphere.
Early stage vendors like Intalio Inc. embraced BPML, a superset of BPEL, while major companies like IBM and Microsoft chose to maintain their existing workflow and integration engine solutions like BizTalk or WebSphere without incorporating BPML.