Extending a Search Model 
If the search models delivered by SAP do not meet your requirements, you can change existing search models. You can extend the search model by an additional field to be searched for.
More Information
For more information about creating and changing search models, see SAP Help Portal at 
http://help.sap.com 
SAP NetWeaver SAP NetWeaver Platform 7.4 Application Help Function-Oriented View Search and Operational Analytics Creating Search and Analysis Models Creating or Enhancing Search Models 
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