@esdl/core

Interfaces:

IEsdlService (how to call the ESDL service, the controller)
IEsdlDatasourcePlugin (talks to the repository/datasource) { init(config: IEsdlConfig); }
IEsdlQuery
IEsdlConfig

toESDL (as xml / json as option)
fromESDL (input in xml)
validateESDL
toGeoJSON
EsdlQueryParser (get Energy system from REGION REGION_ID aggregate by SUB-REGION filter by TIME_PERIOD)
fromMapping(mapping, data, transformers?): ESDL (as JSON object)
XSD schema
TypeScript generated ESDL classes/interfaces

GET -> convert query to query object -> select data -> perform mapping of 'columns' -> perform mapping to ESDL object -> return ESDL object