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The documentation for implementing search help using mortar 4.1x or later is in the search help tag library (searchhelp.tld). The original version of this tag library is maintained in the skeleton, oas-skeleton.
JSP (with Search Icon)
The JSP with the search icon 
will pass mortar a key and one or more field names.
Most of the time the ABAP developer will need to add code to the RFC, Z_CA_SEARCH_HELP, to implement the specific search help that is needed. This RFC is expecting:
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