A structure or map can have multiple points at which it can be associated with a sample document. The simplest case is a structure that does not use the multiple document support available through I/O Functions; it will have only one document binding, for its root element. For maps, the documents may be bound for input purposed (that are associated with structure(s) on the input side) and sample output (that are associated with structure(s) on the output side).
The document bindings are shown in the Repository navigator under the structure or map . Each document bindings shows the element of the structure or map that is bound, what type of binding it is (either input or sample output), and the current sample document that is bound to that instance. The latter is shown by right-clicking on the document binding entry and selecting .