Identifying target interface based on fields of source interface

Hi All,

I have XML file to file scenario.

I may get 2 types of XML files, structure is same but content is diffrent, I may get any type of file.

Based on source content field, I have to identify the target interface and send message accordingly.

My design:

1) One Source interface and two target interfaces.

2) 2 target files should generate in the same business system, so that I used the same service twice in configured receivers.

3) In interface determination I tried to use condition on which it should select the right interface

Here I faced the problem, In X path I was unable to find any fields except root node of XML data.

Pls suggest what to do..

Thanks,

Venu.