The following provides an example of bpelx:append in a BPEL project that supports BPEL version 1.1.

<bpel:assign> 
   <bpelx:append>
      <bpelx:from ... /> 
      <bpelx:to ... /> 
   </bpelx:append> 
</bpel:assign> 

The from-spec query within bpelx:append yields zero or more nodes. The node list is appended as child nodes to the target node specified by the to-spec query.

The to-spec query must yield one single L-Value element node. Otherwise, a bpel:selectionFailure fault is generated. The to-spec query cannot refer to a partner link.

The following example consolidates multiple bills of material into one single bill of material (BOM) by appending multiple b:parts for one BOM to b:parts of the consolidated BOM.

<bpel:assign>
    <bpelx:append>
          <bpelx:from variable="billOfMaterialVar" 
                query="/b:bom/b:parts/b:part" />
          <bpelx:to variable="consolidatedBillOfMaterialVar"
                query="/b:bom/b:parts" />
    </bpelx:append> 
</bpel:assign>