User's Manual

95
Building Streams
To Set Essential Fields
E Right-click the source node of th e template stream that will be replaced.
E On the menu, click:
Data Mapping > Specify Essential Fields
Figure 5-48
Specifying essential fields
E Using the Field Chooser, you can add or remov e fields from the list. To open the Field Chooser,
click the icon to the right of the fields list.
Examining Mapped Fields
Once you have selected the point at which on e data stream or data source will be mapped to
another, a dialog box opens for you to sele ct field s for mapping or to ensure th at the system default
mapping is correct. If essential fields have been set for the stream or data source and t hey are
unmatched, these fields are displayed in re d. Any unmapped fie lds from the data source will pass
through the Filter node un altered, but note that you can map non-essential fields as well.
Figure 5-49
Selecting fields for mapping
Original. Lists all fields in the template or existing stream—all of the fie lds that a r e p r esent further
downst r eam. Fields from the new data source will be mapped to these fields .