Using BizTalk® Mapper, you define the relationship between an input and an output schema using links and functoids. A link defines a direct data copy of a record or field. Links may directly connect to items in the other schema, or they may form connections to functoids. Functoids perform more complex data manipulations. Examples include:
- Adding the value of two fields in the source schema and copying the result to the destination schema.
- Converting a character to its ASCII format.
- Returning the average of a field in a repeating record and copying the result to a field in the destination schema.
BizTalk® Mapper stores maps in a file with a .btm extension. The file saves design information about the map—the locations of icons representing functoids, the links between schema items and functoids, and other information about the map. When you build or compile the map, BizTalk Mapper converts the information about the map into the corresponding XSLT stylesheet.
The maps that you create can transform or translate data, and they can be specific to a single trading partner or be used with many trading partners. The topics in this section provide an introduction to the concepts involved in mapping schemas.
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