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.
BPML, a superset of BPEL, was implemented by some companies, while others, like IBM and Microsoft, chose to stick with their existing workflow and integration engine solutions.