hi BruceThanks a lot for your kindly help the example helped me to revel the secret. a document setting is affecting the behavior. Form properties ->  Defaults ->  Choose target version,  it is set to 9.1+ in your sample XDP, but set to 10+ by default in mine.this perfectly solved my case, and I sur...

hi BruceThanks for the response, it should be a good solution, but I can not get it work yet...does this need some document setting to work? or is related to software version? I am using Designer to preview,  v11.0.1.20130830.1.901444, seems it is an out of dated version.

hi there,I'd like to ask a question that is it possible to travel upward in data binding? like $.parent.data?we have xml like below<level1>     <name>Name</name>     <level2>          <data>Data</data>     </level2></level1>and in XDP, we have subfrom already bind to <level2>   $.level1.level2, but ...