GET /api/classifications/v2/classifications/cpa_1_20150101/classificationItems/20.12.2?format=api
HTTP 200 OK Allow: GET, HEAD, OPTIONS Content-Type: application/json Vary: Accept [ "https://data.stat.fi/api/classifications/v2/classifications/cpa_1_20150101/classificationItems/20.12.2?format=api" ]