Developing SOA Applications with Oracle SOA Suite Sharing Functionality Across Service Components Creating Transformations with the XQuery Mapper Using the XQuery Mapper Using the XQuery Mapper This section contains the following topics: How to Use Value Mapping to Copy a Leaf Element Value to a Target Leaf Element How to Use Overwrite Mapping to Copy an Element Subtree to the Target Tree How to Use Append Mapping to Copy an Element Subtree to the Target Tree How to Perform Multiple Value Mappings with One Drag and Drop Action