Limitations

Mixed mapping

You may only map attributes to other attributes or to IEMessage fields, but not a mix of the two. So the following is not supported, because it includes both:

MyAttr = event.someUserField1 {+} MyAttr2

Recursive mapping

Recursive mapping is not supported. This means that you may do the following:

MyAttr1 = event.someUserField1

MyAttr2 = event.someUserField2

MyAttr3 = event.someUserField3

MyAttr4 = MyAttr1 {+} MyAttr2

MyAttr5 = MyAttr3 {+} MyAttr2

But you may not then take the created attributes MyAttr4 and MyAttr5 and concatenate them further into yet another field, as in:

MyAttr6 = MyAttr4 {+} MyAttr5

Related topics 

Map attributes to an adapter

Attribute external name syntax