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This element defines a multiple input source to a containing <
containing <AttributeDefinition> or <
or <DataConnector>. The precise semantics depend on the type of the enclosing element.
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Multi-attribute definitions are <AttributeDefinition> or <
or <DataConnector> types which can consume multiple input attributes at once. The currently supported cases include:
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Multi-value definitions are <AttributeDefinition> or <
or <DataConnector> types which consume multiple attribute values at once. These values are often, but not always, from one input. Nearly all AttributeDefinition types are multi-value capable. In this case all the attributes and values are made available and values from multiple like-named attributes are combined.
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