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README.md

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+---
+license: cc0-1.0
+language:
+  - en
+  - multilingual
+tags:
+  - wikidata
+  - knowledge-graph
+  - parquet
+  - duckdb
+size_categories:
+  - 1B<n<10B
+pretty_name: Wikidata Truthy (Parquet)
+---
+
+# Wikidata Truthy — Parquet
+
+The complete [Wikidata](https://www.wikidata.org/) truthy snapshot (March 2026), converted from the raw N-Triples dump into optimized Parquet files.
+
+**1.7 billion statements** across 108 million entities, queryable directly with DuckDB — no SPARQL endpoint needed.
+
+## Files
+
+| File | Rows | Size | Description |
+|------|------|------|-------------|
+| `statements.parquet` | 1,703,849,656 | 7.6 GB | All truthy statements (Q-item as subject) |
+| `labels.parquet` | 372,000,059 | 3.4 GB | Labels for all entities in all available languages |
+| `items.parquet` | 108,425,819 | 2.1 GB | One row per entity with best available label (English preferred) |
+| `items_descriptions.parquet` | 101,268,772 | 340 MB | English descriptions for entities |
+| `property_statements.parquet` | 300,032 | 2.9 MB | Statements about properties (P-item as subject) |
+| `properties.parquet` | 13,304 | 446 KB | Property labels and descriptions |
+
+## Schemas
+
+### statements.parquet
+
+The main table. Each row is one truthy statement about a Wikidata item.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `subject` | INT32 | Item ID (e.g. `31` for Q31/Belgium) |
+| `property` | INT16 | Property ID (e.g. `31` for P31/instance-of) |
+| `object_id` | INT32 | Target entity ID when the object is a Wikidata entity, NULL otherwise |
+| `object_value` | VARCHAR | Literal value (number, date, string, coordinate), NULL when `object_id` is set |
+| `datatype` | TINYINT | Type code for the object (see below) |
+
+**Datatype codes:**
+
+| Code | Type | Example |
+|------|------|---------|
+| 0 | Entity reference (Q) | Q5 (human) |
+| 1 | Time | 2026-03-23T13:50:18Z |
+| 2 | Quantity | +5821746 |
+| 3 | String | "1000063" |
+| 4 | Monolingual text | Belgium@en |
+| 5 | Globe coordinate | Point(5.47 49.49) |
+| 6 | URL | http://... |
+| 7 | Other | External URIs, unknown types |
+| 8 | Entity reference (P) | Property reference |
+
+### items.parquet
+
+Lookup table: one row per entity with the best available label.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `qid` | INT32 | Entity ID |
+| `label` | VARCHAR | Best label (English preferred, falls back through 40 languages) |
+| `label_lang` | VARCHAR | Language of the chosen label |
+
+### items_descriptions.parquet
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `qid` | INT32 | Entity ID |
+| `description` | VARCHAR | English description |
+
+### labels.parquet
+
+All labels in all languages.
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `qid` | INT32 | Entity ID |
+| `lang` | VARCHAR | Language code |
+| `label` | VARCHAR | Label text |
+
+### properties.parquet
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `pid` | INT16 | Property ID |
+| `label` | VARCHAR | Property label (English) |
+| `description` | VARCHAR | Property description (English) |
+
+### property_statements.parquet
+
+Same schema as `statements` but for statements where the subject is a property (P-entity).
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `subject` | INT16 | Property ID |
+| `property` | INT16 | Property ID |
+| `object_id` | INT32 | Target entity ID (nullable) |
+| `object_label` | VARCHAR | Resolved label of target entity (nullable) |
+| `object_value` | VARCHAR | Literal value (nullable) |
+| `datatype` | TINYINT | Type code |
+
+## Quick Start with DuckDB
+
+No download needed — query directly from Hugging Face:
+
+```sql
+-- Find all "instance of" (P31) values for Q42 (Douglas Adams)
+SELECT s.subject, p.label AS property, i.label AS value
+FROM 'hf://datasets/RichardDelome/wikidata_truthy/statements.parquet' s
+JOIN 'hf://datasets/RichardDelome/wikidata_truthy/properties.parquet' p ON p.pid = s.property
+JOIN 'hf://datasets/RichardDelome/wikidata_truthy/items.parquet' i ON i.qid = s.object_id
+WHERE s.subject = 42 AND s.property = 31;
+```
+
+```sql
+-- Look up an entity by name
+SELECT qid, label
+FROM 'hf://datasets/RichardDelome/wikidata_truthy/items.parquet'
+WHERE label = 'Douglas Adams';
+```
+
+```sql
+-- All items that are "instance of" "human" (Q5) born in a specific year
+SELECT i.label, s2.object_value AS birth_date
+FROM 'hf://datasets/RichardDelome/wikidata_truthy/statements.parquet' s1
+JOIN 'hf://datasets/RichardDelome/wikidata_truthy/statements.parquet' s2
+  ON s2.subject = s1.subject AND s2.property = 569  -- P569 = date of birth
+JOIN 'hf://datasets/RichardDelome/wikidata_truthy/items.parquet' i
+  ON i.qid = s1.subject
+WHERE s1.property = 31 AND s1.object_id = 5  -- P31 = instance of, Q5 = human
+  AND s2.object_value LIKE '+1952%'
+LIMIT 20;
+```
+
+## Source
+
+Built from [Wikidata's latest-truthy N-Triples dump](https://dumps.wikimedia.org/wikidatawiki/entities/) (March 26, 2026).
+
+Only **truthy** statements are included — the current best-ranked value for each property on each item, excluding deprecated and non-preferred ranks.
+
+## License
+
+The data is from Wikidata and is available under [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/).