Does anybody know how to specify a constant argument while invoking a custom service to extract an attribute from a document type?
We are trying to use a custom service to fetch the SenderID and ReceiverID from a TN XML document and transform it. We have created a custom service implementing the I/O as “wm.tn.rec:StringAttributeTransformService”, what creates 3 input parameters: values, isArray and arg.
There is no problem when passing the results of a XQL to the parameter “values” (done automatically by TN) but we are experiencing that we cannot pass anything to the parameter “arg” (if we specify the input, it is deleted once the Edit Attribute screen is loaded again).
Trading Networks documentation has a hole in this functionallity, as only “Optional arguments that you can define” is written regarding this argument.
Has somebody used this functionallity and knows how it should be done?
Thanks in advance and regards.