After you have defined a name mapping, it will not be active
until you link it to a mining field in the logical data specification.
Use the method DM_setFldNmp to make a name mapping
active. Only categorical fields can be linked to name mappings. If
you want to define a name mapping for a field having numerical values,
you must explicitly force the type of this field to categorical.
Note: If you remove a name mapping by calling DM_remNmp,
you also remove the linkage between the mining field and the name
mapping.
You can check which name mapping is linked to a mining field by
using the method DM_getFldNmp. The procedure call
looks like this:
Example
IDMMX.DM_LogicalDataSpec()..DM_addDataSpecFld('COL1')
..DM_addNmp('MyNmp', 'MYSCHEMA.MYNMPTABLE',
'VALUECOL', 'MAPPEDVALUECOL')
..DM_setFldNmp('COL1', 'MyNmp')