Netherlands: data.overheid.nl
Official portal: data.overheid.nl (opens in a new tab)Why snapshot data?Open-data catalogue totals are dynamic measurements rather than fixed statistics. OpenDataScope therefore uses a timestamped research snapshot as its canonical analytical dataset. Later official-page readings are retained as validation evidence and demonstrate normal catalogue drift over time.Research snapshot: 8 October 2026, 22:21–23:03 UTC9 October 2026, 00:21–01:03 in Skopje (UTC+2)Live portals can change after the research snapshot.How the snapshot was taken
Catalogue size
Partially comparableSimilar idea, but definitions or units differ.Units differ between portals; this count is comparable only in scale.Catalogue size (canonical count)
20,791register records
Later validation reading: 20,790 state total (−1, −0.005 %) on 9 Oct 2026One-record temporal/live discrepancy; cause not documented
Earlier reading (superseded): 19,822 datasets (earlier page reading) (−969, −4.661 %) on 8 Oct 2026Earlier reading; superseded by the S2 API snapshot; cause of the gap not documented
- Unit
- The Netherlands counts register records, including non-public and restricted entries.
- Count definition
- package_search result.count (CKAN API)
- Snapshot layer and time
- S2 · 2026-10-08 23:03:48 UTC
- Comparability note
- Register includes non-public and restricted entries
At a glance
Source catalogues (CKAN organisation facet)
26organisations
Distinct format values (EU file-type vocabulary)
40format URIs
Records offering JSON
9,483register records
Records offering CSV
2,491register records
Publishers and organisations
26 source catalogues in the CKAN facet; data owners sit in a separate field
Source catalogues are not publishers.
Themes
17 national OWMS themes; counts only from an earlier page reading
National theme scheme.
No cross-country theme mapping is used where a reliable taxonomy crosswalk is unavailable. North Macedonia is compared only with the EU portal, which uses the same EU data-theme vocabulary; the other national portals keep their own category schemes.
Access and reuse
| Feature | Netherlandsdata.overheid.nl |
|---|---|
| API availability | Available CKAN API v3, no key Directly comparableSame or closely comparable unit and query.Whether a public metadata API exists is the same yes/no question everywhere; API types differ. |
| Machine-readable formats | Available JSON in 45.6 % and CSV in 12.0 % of records; controlled EU vocabulary (40 values) Directly comparableSame or closely comparable unit and query.Share of records offering at least one JSON or CSV resource: same dataset-level measure in MK and NL. |
| Metadata standard | Available DCAT-AP-DONL Not directly comparableUseful background, not quantitatively comparable.National profile of DCAT-AP. |
| Licensing information | Available 89.6 % carry an open-licence id Directly comparableSame or closely comparable unit and query.Same CKAN license_id field in North Macedonia and the Netherlands. |
| HVD information | Not collected Not in the snapshot; an earlier page reading showed 197 HVD category assignments |
| Publisher information | Limited 26 source catalogues in the CKAN facet; data owners sit in a separate field Not directly comparableUseful background, not quantitatively comparable.Source catalogues are not publishers. |
| Metadata activity | Available 81.7 % of records Directly comparableSame or closely comparable unit and query.Same CKAN metadata_modified query on North Macedonia, the United Kingdom and the Netherlands. |
Netherlandsdata.overheid.nl
- API availability
- Available
CKAN API v3, no key
Directly comparableSame or closely comparable unit and query.Whether a public metadata API exists is the same yes/no question everywhere; API types differ. - Machine-readable formats
- Available
JSON in 45.6 % and CSV in 12.0 % of records; controlled EU vocabulary (40 values)
Directly comparableSame or closely comparable unit and query.Share of records offering at least one JSON or CSV resource: same dataset-level measure in MK and NL. - Metadata standard
- Available
DCAT-AP-DONL
Not directly comparableUseful background, not quantitatively comparable.National profile of DCAT-AP. - Licensing information
- Available
89.6 % carry an open-licence id
Directly comparableSame or closely comparable unit and query.Same CKAN license_id field in North Macedonia and the Netherlands. - HVD information
- Not collected
Not in the snapshot; an earlier page reading showed 197 HVD category assignments
- Publisher information
- Limited
26 source catalogues in the CKAN facet; data owners sit in a separate field
Not directly comparableUseful background, not quantitatively comparable.Source catalogues are not publishers. - Metadata activity
- Available
81.7 % of records
Directly comparableSame or closely comparable unit and query.Same CKAN metadata_modified query on North Macedonia, the United Kingdom and the Netherlands.
Validation readings
Validation readings: 9 October 2026, before 11:13 UTC. Canonical values keep the main position; later readings are validation evidence, and earlier readings are superseded.
| Reading | Visible value | Kind | Reading time | Difference from canonical | Note | Record |
|---|---|---|---|---|---|---|
| state: available | 20,517 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| state: being researched | 173 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| state: not available | 96 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| state: planned | 4 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| publicity: public | 18,530 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| publicity: non-public | 1,484 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| publicity: restricted | 717 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | No note | |
| state total | 20,790 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | −1 (−0.005 %) | One-record temporal/live discrepancy; cause not documented | |
| publicity classified total | 20,731 | Later validation reading | 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded) | Not applicable | 59 records without a publicity value | |
| datasets (earlier page reading) | 19,822 | Earlier reading (superseded) | 8 Oct 2026, 22:32:14–22:34:30 UTC | −969 (−4.661 %) | Earlier reading; superseded by the S2 API snapshot; cause of the gap not documented |
Validation readings: Netherlands
state: available
- Visible value
- 20,517
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
state: being researched
- Visible value
- 173
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
state: not available
- Visible value
- 96
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
state: planned
- Visible value
- 4
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
publicity: public
- Visible value
- 18,530
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
publicity: non-public
- Visible value
- 1,484
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
publicity: restricted
- Visible value
- 717
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- No note
- Record
state total
- Visible value
- 20,790
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- −1 (−0.005 %)
- Note
- One-record temporal/live discrepancy; cause not documented
- Record
publicity classified total
- Visible value
- 20,731
- Kind
- Later validation reading
- Reading time
- 9 Oct 2026, after S2 and before 11:13 UTC (exact capture time not recorded)
- Difference from canonical
- Not applicable
- Note
- 59 records without a publicity value
- Record
datasets (earlier page reading)
- Visible value
- 19,822
- Kind
- Earlier reading (superseded)
- Reading time
- 8 Oct 2026, 22:32:14–22:34:30 UTC
- Difference from canonical
- −969 (−4.661 %)
- Note
- Earlier reading; superseded by the S2 API snapshot; cause of the gap not documented
- Record
Comparability notes
- Count definition
- package_search result.count (CKAN API)
- Includes non-open records
- Yes: the count includes non-open, restricted or non-public records.
- Comparability note
- Register includes non-public and restricted entries
Sources
data.europa.eu search API, datasets with facets
data.europa.eu · API snapshot · S1 · Aggregated records, HVD, themes, provenance, catalogue copies
data.overheid.nl package_search with facets
data.overheid.nl (CKAN API) · API snapshot · S2 · Records, licences, source organisations, formats
data.overheid.nl package_search, metadata modified in 365 days
data.overheid.nl (CKAN API) · API snapshot · S2 · Metadata activity
data.overheid.nl dataset page (state and publicity)
data.overheid.nl · Manual screenshot (validation) · V (later reading) · Validation
data.overheid.nl dataset page (earlier reading, R1)
data.overheid.nl · Official page reading · Earlier reading · Validation; HVD category and theme counts
data.overheid.nl API documentation
data.overheid.nl · Documentation · Docs · API access; DCAT-AP-DONL
Open Data Maturity 2025 report
data.europa.eu (European Commission) · Report · Docs · Maturity clusters; Germany's SPARQL endpoint
OpenDataScope Final Phase 1 Research Report (sections A3, D)
OpenDataScope project · Report · Docs · Access-matrix facts whose underlying document was not itemised
Internal project document