BPEL2.0规范中的copy节点有个属性:ignoreMissingFromData和 keepSrcElementName,具体表示如下:




规范中关于ignoreMissingFromData的描述如下:
The optional ignoreMissingFromData attribute of the <copy> construct is used to specify whether a bpel:selectionFailure standard fault is suppressed as specified in section 8.4.1. Selection Result of Copy Operations. The default value of the ignoreMissingFromData is "no".
当ignoreMissingFromData属性的值被设置为“yes”的时候,不抛出bpel:selectionFailure异常。反之则抛出异常。