Official and academic sources Verified

Parliamentary groups of the Federal Assembly

parl-groups

Publisher: Parliamentary Services of the Federal Assembly
Link: https://www.parlament.ch/de/%C3%BCber-das-parlament/fakten-und-zahlen/open-data-web-services
Access method: odata
Endpoint: https://ws.parlament.ch/odata.svc/ParlGroup
Table id: ParlGroup
Licence: Parliamentary Services conditions of use: source "Parlamentsdienste der Bundesversammlung, Bern" must be named; content must not be altered; the download date must always be visible; no use may suggest an official publication.
Coverage: Geography national · rows current and historical groups, 31 on 2026-10-31 (7 active incl. "FRAKTIONSLOS" = non-attached)
Gaps: No English names (see transformations). colour is published for six of the seven active groups (none for GL) and for no historical group.
Used on: STEER-01, AGORA-13, AGORA-17, STEER-05
Known limits: Group colours are the Parliamentary Services' (used for their seating plans), not party brand colours — see src/lib/config/parties.ts for party colours. Group 3 is named "Die Mitte-Fraktion. Die Mitte. EVP." here and "Mitte-Fraktion (Die Mitte-EVP)" in the Federal Chancellery's "Der Bund kurz erklärt 2026". Historical groups have placeholder dates for name_used_since in some cases (e.g. 1900-01-01).
Verification: verification date: 2026-10-31 · method: Fetched ParlGroup from ws.parlament.ch. Compared the German names of the six active groups with the Federal Chancellery's "Der Bund kurz erklärt 2026" (p. 37, as of 19.12.2025): five identical (Fraktion der Schweizerischen Volkspartei, Sozialdemokratische Fraktion, FDP-Liberale Fraktion, Grüne Fraktion, Grünliberale Fraktion); M-E worded differently (knownLimits). Member counts per group agree, see parl-members. · checkedValue: group 4 (V): "Fraktion der Schweizerischen Volkspartei" · checkedAgainst: https://www.bk.admin.ch/dam/de/sd-web/B74oYqykWJXb/Der%20Bund%20kurz%20erkl%C3%A4rt%202026.pdf
Processed file: data/processed/parl-groups.csv

How current is this data?

Freshness: Up to date
According to its update rhythm, no newer edition is expected yet.
Period covered: Not a time series
Last change of the data: 31 October 2026
Last check of the source: 10 November 2026
Update rhythm: Irregular
Ledger note (in English): Rarely — after elections or when groups form, merge or rename.
Votara checks the source: Every week, and every day from 3 days before to 14 days after an announced publication date

The state is computed each time the site is built; this page shows it as of 14 November 2026. Results of the accuracy checks

Transformations

OData GET ParlGroup, languages DE, FR, IT and EN. Script: scripts/fetch/parl-opendata.ts
group_id = ID (= ParlGroupNumber); abbr = ParlGroupAbbreviation (German row); name_* = ParlGroupName per language; active = IsActive; name_used_since = NameUsedSince as YYYY-MM-DD.
colour = ParlGroupColour, published as 0xRRGGBB, written as
DECISION — the EN rows repeat the French text (all 31 groups on 2026-10-31); name_en is filled only where it differs from French, so it is empty today.
Rows sorted by group_id.