You can map multiple source schemas to multiple target schemas within a single map. Simply drag and drop the source and target schemas that you want to use onto the Map Editor, set the root element property for each schema, and establish links between each of the elements.
To map multiple schemas:
Open the map activity icon in your project.
Expand the schema icons in your map and align and size your schemas into a workable order. Guidelines
Drag and drop the source and target schemas that you want to use onto the Map Editor.
To map a connection,
drag the source node you want to map and drop it on the target node.
If the connection is valid, a map link graphically connects the two.
Note: To modify the source or target element of the link, delete it and then re-establish the link. You cannot reattach the link to another element.
In Properties, select one of the following Mapping Modes from the drop-down list:
To output a value inside a CDATA Section, set the Output as CDATA property to Yes. If your map requires that a source element value be output in an embedded XML CDATA Section, then you can must set the Output as CDATA property to Yes.
To save your changes,
select File>Save mapName.map from the menu bar.
When you save your map, the XSLT required to transform the source to
target document is automatically generated.