This image shows a master BPEL process in the middle.

On the left side, an outbound arrow labeled Validates Header connects to the label Sales Order 1. Two boxes display below this label: Header (with two bullet points: customer information and ship-to address) and Line Items (with four bullet points: item names, item numbers, price, and quantity).

On the right side, an outbound arrow labeled Validates Header connects to the label Sales Order 2. Two boxes display below this label: Header (with two bullet points: customer information and ship-to address) and Line Items (with four bullet points: item names, item numbers, price, and quantity).

In the lower right corner of the master BPEL process there are two arrows: An outgoing arrow labeled Completes Header Validation and Signals Detail Process to Continue connects to a process labeled Detail BPEL Process 2. An incoming arrow from Detail BPEL Process 2 is labeled Completes Line Validation and Signals Master Process.

On the right side of Detail BPEL Process 2 is an outgoing arrow labeled Validates Line Items that connects to the Line Items box of Sales Order 2.

In the lower left corner of the master BPEL process there are two arrows: An outgoing arrow labeled Completes Header Validation and Signals Detail Process to Continue connects to a process labeled Detail BPEL Process 2. An incoming arrow from Detail BPEL Process 2 is labeled Completes Line Validation and Signals Master Process.