@prefix rr: <http://www.w3.org/ns/r2rml#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ex: <http://example.com/ns#> .
@prefix emp: <http://example.com/emp#> .
@prefix dept: <http://example.com/dept#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@base <http://example.com/base/> .

<TriplesMap4>
	a rr:TriplesMap;
    rr:logicalTable [ rr:sqlQuery """

        SELECT "EMP".*, (CASE "job"
            WHEN 'CLERK' THEN 'general-office'
            WHEN 'NIGHTGUARD' THEN 'security'
            WHEN 'ENGINEER' THEN 'engineering'
        END) AS ROLE FROM "EMP"

        """ ];
    rr:subjectMap [
        rr:template "http://data.example.com/employee/{\"empno\"}";
    ];
    rr:predicateObjectMap [
        rr:predicate ex:role;
        rr:objectMap [ rr:template "http://data.example.com/roles/{ROLE}" ];
    ].