As a system librarian I want to utilse map/dictionary function in my transformation pipeline. Our currently underlying transformation engine Metafacture already offers such a feature, see https://github.com/culturegraph/metafacture-core/wiki/Data-lookup#defining-maps. So we need to evaluate/test it and bring this functionality into d:swarm, i.e.,
- extend the morph script builder
- extend the function.sql with the function description of 'map'