Creation IDoc in webmethods

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1

I am working with webMethods 8.2.
In the list of elements present in the designer there is no name called to create IDoc,

How can i create I Doc in designer 8.2.

And I created RFC asyn Sap notification, can we able to create in RFC asyn notification.

And I worked with ALE notification syn/asyn.
it is showing tab called IDOC list of information.

How can we use the IDoc( Intermediate document ) in webMethods 8.2

How to map IDoc with Doc.

IDoc and Document in webMethods are same in structure or not.

if not same, what will be the difference

2

when you talk designer 8.2, that should also be developer in old age. so you should login to SAP and get dtd file generated from IDoc, and create a schema from this dtd and generate document type of IDoc in developer.