The value codes of each facet, read from the website's search form
(https://www.lobbyregister.bundestag.de/suche, 2026-10-06). The register matches
nothing for any other value (HTTP 200, resultCount: 0), so the client accepts
only these unless allowUnknownFilters is set; when the register adds a value, add
it here. Sub-codes (fields of interest, revolving-door areas) are listed in the
parent|sub form the register needs; canonicalFilterValue turns a bare sub-code
as the entries carry it (FOI_EU_LAWS) into that form.
The value codes of each facet, read from the website's search form (https://www.lobbyregister.bundestag.de/suche, 2026-10-06). The register matches nothing for any other value (HTTP 200,
resultCount: 0), so the client accepts only these unlessallowUnknownFiltersis set; when the register adds a value, add it here. Sub-codes (fields of interest, revolving-door areas) are listed in theparent|subform the register needs;canonicalFilterValueturns a bare sub-code as the entries carry it (FOI_EU_LAWS) into that form.