Represents a mapping of 2 fields. When a link connects an infoshape to a base infoshape,
a mapping should be defined between fields in the source infoshape and the fields in the target infoshape.<q ref="core.gml:Element">Element</q>(c) SAP AG 2003-2006. All rights reserved.
The field located on the source infoshape.
The field located on the target (base) infoshape.