The register's spelling of a facet value: matched case-insensitively against
SEARCH_FILTER_VALUES (TRUE → true, foi_energy → FOI_ENERGY), and a bare
sub-code as the entries carry it in fieldsOfInterest[].code given its parent
(FOI_EU_LAWS → FOI_EUROPEAN_UNION|FOI_EU_LAWS, FOI_ENERGY_NET →
FOI_ENERGY|FOI_ENERGY_NET). A value the catalogue doesn't know is returned
unchanged.
The register's spelling of a facet value: matched case-insensitively against
SEARCH_FILTER_VALUES(TRUE→true,foi_energy→FOI_ENERGY), and a bare sub-code as the entries carry it infieldsOfInterest[].codegiven its parent (FOI_EU_LAWS→FOI_EUROPEAN_UNION|FOI_EU_LAWS,FOI_ENERGY_NET→FOI_ENERGY|FOI_ENERGY_NET). A value the catalogue doesn't know is returned unchanged.