feat: OpenAlex snapshot with source .jsonl.gz and extracted parquet relationships

.gitattributes

@@ -0,0 +1,2 @@
+*.jsonl.gz filter=lfs diff=lfs merge=lfs -text
+*.parquet filter=lfs diff=lfs merge=lfs -text

.githooks/pre-commit

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+# Pre-commit hook: validate README.md YAML frontmatter for HuggingFace dataset card.
+# Ensures required fields are present and non-empty.
+
+set -euo pipefail
+
+README="README.md"
+
+if [ ! -f "$README" ]; then
+    echo "Error: $README not found"
+    exit 1
+fi
+
+# Extract YAML frontmatter (between opening and closing ---)
+frontmatter=$(awk '/^---$/{n++; next} n==1{print} n==2{exit}' "$README")
+
+if [ -z "$frontmatter" ]; then
+    echo "Error: $README has no YAML frontmatter (must start with ---)"
+    exit 1
+fi
+
+# Required fields per HuggingFace dataset card spec
+required_fields=(
+    "license"
+    "task_categories"
+    "size_categories"
+)
+
+errors=0
+for field in "${required_fields[@]}"; do
+    if ! echo "$frontmatter" | grep -q "^${field}:"; then
+        echo "Error: $README missing required field '$field'"
+        errors=$((errors + 1))
+    else
+        # Check the value isn't empty — either inline or as a YAML list on the next line
+        inline_value=$(echo "$frontmatter" | grep "^${field}:" | sed "s/^${field}://" | sed 's/^[[:space:]]*//')
+        if [ -z "$inline_value" ]; then
+            # Value might be a multi-line list; check the next line starts with -
+            if ! echo "$frontmatter" | grep -A1 "^${field}:" | tail -1 | grep -q '^- '; then
+                echo "Error: $README field '$field' is empty"
+                errors=$((errors + 1))
+            fi
+        fi
+    fi
+done
+
+if [ "$errors" -gt 0 ]; then
+    echo ""
+    echo "See https://huggingface.co/docs/hub/datasets-cards#yaml-metadata"
+    exit 1
+fi

.gitignore

@@ -0,0 +1,14 @@
+# Python
+__pycache__/
+*.pyc
+sync/__pycache__/
+
+# Provenance (replaced by direct parquet shard existence checks)
+_units/
+
+# Staging
+.hf_synced/
+
+# macOS
+.DS_Store
+._*

README.md

@@ -0,0 +1,1603 @@
+---
+license: cc0-1.0
+papers:
+- https://arxiv.org/abs/2205.01833
+annotations_creators:
+- found
+- machine-generated
+language_creators:
+- found
+language:
+- en
+- mul
+pretty_name: OpenAlex Snapshot
+tags:
+- academic
+- scholarly-metadata
+- citation-data
+- bibliometrics
+- open-science
+- tabular
+size_categories:
+- n>1T
+source_datasets:
+- original
+task_categories:
+- tabular-classification
+- feature-extraction
+configs:
+- config_name: works
+  data_files: data/works/**/*.jsonl.gz
+  default: true
+  features:
+    - name: id
+      dtype: string
+    - name: doi
+      dtype: string
+    - name: title
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: indexed_in
+      dtype: string
+    - name: publication_date
+      dtype: string
+    - name: publication_year
+      dtype: int64
+    - name: language
+      dtype: string
+    - name: type
+      dtype: string
+    - name: authorships
+      dtype: string
+    - name: authors_count
+      dtype: int64
+    - name: corresponding_author_ids
+      dtype: string
+    - name: corresponding_institution_ids
+      dtype: string
+    - name: primary_topic
+      dtype: string
+    - name: topics
+      dtype: string
+    - name: keywords
+      dtype: string
+    - name: concepts
+      dtype: string
+    - name: locations
+      dtype: string
+    - name: locations_count
+      dtype: int64
+    - name: primary_location
+      dtype: string
+    - name: best_oa_location
+      dtype: string
+    - name: sustainable_development_goals
+      dtype: string
+    - name: awards
+      dtype: string
+    - name: funders
+      dtype: string
+    - name: institutions
+      dtype: string
+    - name: countries_distinct_count
+      dtype: int64
+    - name: institutions_distinct_count
+      dtype: int64
+    - name: open_access
+      dtype: string
+    - name: is_paratext
+      dtype: bool
+    - name: is_retracted
+      dtype: bool
+    - name: is_xpac
+      dtype: bool
+    - name: biblio
+      dtype: string
+    - name: referenced_works
+      dtype: string
+    - name: referenced_works_count
+      dtype: int64
+    - name: related_works
+      dtype: string
+    - name: abstract_inverted_index
+      dtype: string
+    - name: cited_by_count
+      dtype: int64
+    - name: counts_by_year
+      dtype: string
+    - name: apc_list
+      dtype: string
+    - name: apc_paid
+      dtype: string
+    - name: fwci
+      dtype: float64
+    - name: citation_normalized_percentile
+      dtype: string
+    - name: cited_by_percentile_year
+      dtype: string
+    - name: mesh
+      dtype: string
+    - name: has_content
+      dtype: string
+    - name: has_fulltext
+      dtype: bool
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: authors
+  data_files: data/authors/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: orcid
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: display_name_alternatives
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: summary_stats
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: affiliations
+      dtype: string
+    - name: last_known_institutions
+      dtype: string
+    - name: topics
+      dtype: string
+    - name: topic_share
+      dtype: string
+    - name: x_concepts
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: works_api_url
+      dtype: string
+    - name: updated_date
+      dtype: string
+    - name: created_date
+      dtype: string
+- config_name: sources
+  data_files: data/sources/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: issn_l
+      dtype: string
+    - name: issn
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: host_organization
+      dtype: string
+    - name: host_organization_name
+      dtype: string
+    - name: host_organization_lineage
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: oa_works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: summary_stats
+      dtype: string
+    - name: is_oa
+      dtype: bool
+    - name: is_in_doaj
+      dtype: bool
+    - name: is_in_doaj_since_year
+      dtype: string
+    - name: is_high_oa_rate
+      dtype: bool
+    - name: is_high_oa_rate_since_year
+      dtype: string
+    - name: is_in_scielo
+      dtype: bool
+    - name: is_ojs
+      dtype: bool
+    - name: is_core
+      dtype: bool
+    - name: oa_flip_year
+      dtype: string
+    - name: first_publication_year
+      dtype: int64
+    - name: last_publication_year
+      dtype: int64
+    - name: ids
+      dtype: string
+    - name: homepage_url
+      dtype: string
+    - name: apc_prices
+      dtype: string
+    - name: apc_usd
+      dtype: string
+    - name: country_code
+      dtype: string
+    - name: societies
+      dtype: string
+    - name: alternate_titles
+      dtype: string
+    - name: type
+      dtype: string
+    - name: topics
+      dtype: string
+    - name: topic_share
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: works_api_url
+      dtype: string
+    - name: updated_date
+      dtype: string
+    - name: created_date
+      dtype: string
+- config_name: institutions
+  data_files: data/institutions/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: ror
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: country_code
+      dtype: string
+    - name: type
+      dtype: string
+    - name: lineage
+      dtype: string
+    - name: is_super_system
+      dtype: bool
+    - name: type_id
+      dtype: string
+    - name: homepage_url
+      dtype: string
+    - name: image_url
+      dtype: string
+    - name: image_thumbnail_url
+      dtype: string
+    - name: display_name_acronyms
+      dtype: string
+    - name: display_name_alternatives
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: ids
+      dtype: string
+    - name: roles
+      dtype: string
+    - name: repositories
+      dtype: string
+    - name: geo
+      dtype: string
+    - name: wikidata_id
+      dtype: string
+    - name: wiki_page
+      dtype: string
+    - name: topics
+      dtype: string
+    - name: topic_share
+      dtype: string
+    - name: associated_institutions
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: summary_stats
+      dtype: string
+    - name: works_api_url
+      dtype: string
+    - name: updated_date
+      dtype: string
+    - name: created_date
+      dtype: string
+- config_name: publishers
+  data_files: data/publishers/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: lineage
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: alternate_titles
+      dtype: string
+    - name: country_codes
+      dtype: string
+    - name: hierarchy_level
+      dtype: int64
+    - name: ids
+      dtype: string
+    - name: ror_id
+      dtype: string
+    - name: image_url
+      dtype: string
+    - name: image_thumbnail_url
+      dtype: string
+    - name: wikidata_id
+      dtype: string
+    - name: homepage_url
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: summary_stats
+      dtype: string
+    - name: roles
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: sources_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: funders
+  data_files: data/funders/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: alternate_titles
+      dtype: string
+    - name: country_code
+      dtype: string
+    - name: description
+      dtype: string
+    - name: homepage_url
+      dtype: string
+    - name: image_url
+      dtype: string
+    - name: image_thumbnail_url
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: awards_count
+      dtype: int64
+    - name: roles
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: summary_stats
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: awards
+  data_files: data/awards/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: description
+      dtype: string
+    - name: funder_award_id
+      dtype: string
+    - name: amount
+      dtype: float64
+    - name: currency
+      dtype: string
+    - name: funder
+      dtype: string
+    - name: funding_type
+      dtype: string
+    - name: funder_scheme
+      dtype: string
+    - name: provenance
+      dtype: string
+    - name: start_date
+      dtype: string
+    - name: end_date
+      dtype: string
+    - name: start_year
+      dtype: int64
+    - name: end_year
+      dtype: int64
+    - name: lead_investigator
+      dtype: string
+    - name: co_lead_investigator
+      dtype: string
+    - name: investigators
+      dtype: string
+    - name: landing_page_url
+      dtype: string
+    - name: doi
+      dtype: string
+    - name: works_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+    - name: funded_outputs
+      dtype: string
+    - name: funded_outputs_count
+      dtype: int64
+- config_name: concepts
+  data_files: data/concepts/**/*.jsonl.gz
+  features:
+    - name: id
+      dtype: string
+    - name: wikidata
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: level
+      dtype: int64
+    - name: description
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: summary_stats
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: image_url
+      dtype: string
+    - name: image_thumbnail_url
+      dtype: string
+    - name: international
+      dtype: string
+    - name: ancestors
+      dtype: string
+    - name: related_concepts
+      dtype: string
+    - name: counts_by_year
+      dtype: string
+    - name: works_api_url
+      dtype: string
+    - name: updated_date
+      dtype: string
+    - name: created_date
+      dtype: string
+- config_name: topics
+  data_files: data/topics/**/*.jsonl.gz
+  features:
+    - name: original_id
+      dtype: int64
+    - name: id
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: description
+      dtype: string
+    - name: keywords
+      dtype: string
+    - name: domain
+      dtype: string
+    - name: field
+      dtype: string
+    - name: subfield
+      dtype: string
+    - name: siblings
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: works_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: domains
+  data_files: data/domains/**/*.jsonl.gz
+  features:
+    - name: original_id
+      dtype: int64
+    - name: id
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: display_name_alternatives
+      dtype: string
+    - name: description
+      dtype: string
+    - name: fields
+      dtype: string
+    - name: siblings
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: works_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: fields
+  data_files: data/fields/**/*.jsonl.gz
+  features:
+    - name: original_id
+      dtype: int64
+    - name: id
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: display_name_alternatives
+      dtype: string
+    - name: description
+      dtype: string
+    - name: domain
+      dtype: string
+    - name: subfields
+      dtype: string
+    - name: siblings
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: works_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+- config_name: subfields
+  data_files: data/subfields/**/*.jsonl.gz
+  features:
+    - name: original_id
+      dtype: int64
+    - name: id
+      dtype: string
+    - name: ids
+      dtype: string
+    - name: display_name
+      dtype: string
+    - name: display_name_alternatives
+      dtype: string
+    - name: description
+      dtype: string
+    - name: domain
+      dtype: string
+    - name: field
+      dtype: string
+    - name: topics
+      dtype: string
+    - name: siblings
+      dtype: string
+    - name: works_count
+      dtype: int64
+    - name: cited_by_count
+      dtype: int64
+    - name: works_api_url
+      dtype: string
+    - name: created_date
+      dtype: string
+    - name: updated_date
+      dtype: string
+dataset_info:
+  - config_name: domains_external_ids
+    data_dir: domains/external_ids
+    features:
+      - name: domain_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 12
+    num_bytes: 1406
+    num_shards: 1
+  - config_name: domains_name_alternatives
+    data_dir: domains/name_alternatives
+    features:
+      - name: domain_id
+        dtype: int64
+      - name: display_name_alternative
+        dtype: string
+    num_rows: 6
+    num_bytes: 984
+    num_shards: 1
+  - config_name: fields_domains
+    data_dir: fields/domains
+    features:
+      - name: field_id
+        dtype: int64
+      - name: domain_id
+        dtype: int64
+    num_rows: 26
+    num_bytes: 937
+    num_shards: 1
+  - config_name: fields_external_ids
+    data_dir: fields/external_ids
+    features:
+      - name: field_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 78
+    num_bytes: 2225
+    num_shards: 1
+  - config_name: fields_name_alternatives
+    data_dir: fields/name_alternatives
+    features:
+      - name: field_id
+        dtype: int64
+      - name: display_name_alternative
+        dtype: string
+    num_rows: 60
+    num_bytes: 1805
+    num_shards: 1
+  - config_name: subfields_domains
+    data_dir: subfields/domains
+    features:
+      - name: subfield_id
+        dtype: int64
+      - name: domain_id
+        dtype: int64
+    num_rows: 252
+    num_bytes: 2166
+    num_shards: 1
+  - config_name: subfields_external_ids
+    data_dir: subfields/external_ids
+    features:
+      - name: subfield_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 756
+    num_bytes: 11198
+    num_shards: 1
+  - config_name: subfields_fields
+    data_dir: subfields/fields
+    features:
+      - name: subfield_id
+        dtype: int64
+      - name: field_id
+        dtype: int64
+    num_rows: 252
+    num_bytes: 2354
+    num_shards: 1
+  - config_name: subfields_name_alternatives
+    data_dir: subfields/name_alternatives
+    features:
+      - name: subfield_id
+        dtype: int64
+      - name: display_name_alternative
+        dtype: string
+    num_rows: 393
+    num_bytes: 6728
+    num_shards: 1
+  - config_name: topics_domains
+    data_dir: topics/domains
+    features:
+      - name: topic_id
+        dtype: int64
+      - name: domain_id
+        dtype: int64
+    num_rows: 4516
+    num_bytes: 27397
+    num_shards: 1
+  - config_name: topics_external_ids
+    data_dir: topics/external_ids
+    features:
+      - name: topic_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 9032
+    num_bytes: 145268
+    num_shards: 1
+  - config_name: topics_fields
+    data_dir: topics/fields
+    features:
+      - name: topic_id
+        dtype: int64
+      - name: field_id
+        dtype: int64
+    num_rows: 4516
+    num_bytes: 29182
+    num_shards: 1
+  - config_name: topics_keywords
+    data_dir: topics/keywords
+    features:
+      - name: topic_id
+        dtype: int64
+      - name: keyword
+        dtype: string
+    num_rows: 45154
+    num_bytes: 482701
+    num_shards: 1
+  - config_name: topics_subfields
+    data_dir: topics/subfields
+    features:
+      - name: topic_id
+        dtype: int64
+      - name: subfield_id
+        dtype: int64
+    num_rows: 4516
+    num_bytes: 31796
+    num_shards: 1
+  - config_name: publishers_alternate_titles
+    data_dir: publishers/alternate_titles
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: title
+        dtype: string
+    num_rows: 9072
+    num_bytes: 382770
+    num_shards: 51
+  - config_name: publishers_countries
+    data_dir: publishers/countries
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: country_code
+        dtype: string
+    num_rows: 18518
+    num_bytes: 279010
+    num_shards: 51
+  - config_name: publishers_counts_by_year
+    data_dir: publishers/counts_by_year
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+    num_rows: 188549
+    num_bytes: 1846648
+    num_shards: 51
+  - config_name: publishers_external_ids
+    data_dir: publishers/external_ids
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 47468
+    num_bytes: 1259281
+    num_shards: 51
+  - config_name: publishers_lineage
+    data_dir: publishers/lineage
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: ancestor_publisher_id
+        dtype: int64
+    num_rows: 0
+    num_bytes: 21573
+    num_shards: 51
+  - config_name: publishers_roles
+    data_dir: publishers/roles
+    features:
+      - name: publisher_id
+        dtype: int64
+      - name: role_entity_id
+        dtype: int64
+      - name: role_type
+        dtype: string
+      - name: role_prefix
+        dtype: string
+    num_rows: 32476
+    num_bytes: 748215
+    num_shards: 51
+  - config_name: funders_alternate_titles
+    data_dir: funders/alternate_titles
+    features:
+      - name: funder_id
+        dtype: int64
+      - name: title
+        dtype: string
+    num_rows: 71645
+    num_bytes: 1450887
+    num_shards: 1
+  - config_name: funders_counts_by_year
+    data_dir: funders/counts_by_year
+    features:
+      - name: funder_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+      - name: oa_works_count
+        dtype: int64
+    num_rows: 551451
+    num_bytes: 2705836
+    num_shards: 1
+  - config_name: funders_external_ids
+    data_dir: funders/external_ids
+    features:
+      - name: funder_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 135985
+    num_bytes: 1422310
+    num_shards: 1
+  - config_name: funders_roles
+    data_dir: funders/roles
+    features:
+      - name: funder_id
+        dtype: int64
+      - name: role_entity_id
+        dtype: int64
+      - name: role_type
+        dtype: string
+      - name: role_prefix
+        dtype: string
+    num_rows: 52733
+    num_bytes: 588203
+    num_shards: 1
+  - config_name: awards_funded_outputs
+    data_dir: awards/funded_outputs
+    features:
+      - name: award_id
+        dtype: int64
+      - name: work_id
+        dtype: int64
+    num_rows: 32514594
+    num_bytes: 357839382
+    num_shards: 20
+  - config_name: awards_investigator_affiliations
+    data_dir: awards/investigator_affiliations
+    features:
+      - name: award_id
+        dtype: int64
+      - name: investigator_orcid
+        dtype: string
+      - name: investigator_family_name
+        dtype: string
+      - name: affiliation_id
+        dtype: string
+      - name: affiliation_type
+        dtype: string
+      - name: asserted_by
+        dtype: string
+    num_rows: 742905
+    num_bytes: 22178902
+    num_shards: 20
+  - config_name: awards_investigators
+    data_dir: awards/investigators
+    features:
+      - name: award_id
+        dtype: int64
+      - name: given_name
+        dtype: string
+      - name: family_name
+        dtype: string
+      - name: orcid
+        dtype: string
+      - name: affiliation_name
+        dtype: string
+      - name: affiliation_country
+        dtype: string
+      - name: role_start
+        dtype: string
+      - name: is_lead
+        dtype: bool
+      - name: is_co_lead
+        dtype: bool
+    num_rows: 4658360
+    num_bytes: 249300204
+    num_shards: 20
+  - config_name: concepts_ancestors
+    data_dir: concepts/ancestors
+    features:
+      - name: concept_id
+        dtype: int64
+      - name: ancestor_concept_id
+        dtype: int64
+    num_rows: 0
+    num_bytes: 1221
+    num_shards: 3
+  - config_name: concepts_counts_by_year
+    data_dir: concepts/counts_by_year
+    features:
+      - name: concept_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+      - name: oa_works_count
+        dtype: int64
+    num_rows: 0
+    num_bytes: 2115
+    num_shards: 3
+  - config_name: concepts_external_ids
+    data_dir: concepts/external_ids
+    features:
+      - name: concept_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 195078
+    num_bytes: 3086645
+    num_shards: 3
+  - config_name: concepts_related
+    data_dir: concepts/related
+    features:
+      - name: concept_id
+        dtype: int64
+      - name: related_concept_id
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 0
+    num_bytes: 1551
+    num_shards: 3
+  - config_name: institutions_associations
+    data_dir: institutions/associations
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: associated_institution_id
+        dtype: int64
+      - name: relationship_type
+        dtype: string
+    num_rows: 131583
+    num_bytes: 2003185
+    num_shards: 61
+  - config_name: institutions_counts_by_year
+    data_dir: institutions/counts_by_year
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+      - name: oa_works_count
+        dtype: int64
+    num_rows: 2107775
+    num_bytes: 25242763
+    num_shards: 61
+  - config_name: institutions_external_ids
+    data_dir: institutions/external_ids
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 437211
+    num_bytes: 11418278
+    num_shards: 61
+  - config_name: institutions_lineage
+    data_dir: institutions/lineage
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: ancestor_institution_id
+        dtype: int64
+    num_rows: 58865
+    num_bytes: 785710
+    num_shards: 61
+  - config_name: institutions_name_acronyms
+    data_dir: institutions/name_acronyms
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: display_name_acronym
+        dtype: string
+    num_rows: 81935
+    num_bytes: 1888938
+    num_shards: 61
+  - config_name: institutions_name_alternatives
+    data_dir: institutions/name_alternatives
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: display_name_alternative
+        dtype: string
+    num_rows: 132397
+    num_bytes: 7667620
+    num_shards: 61
+  - config_name: institutions_repositories
+    data_dir: institutions/repositories
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: source_id
+        dtype: int64
+    num_rows: 8186
+    num_bytes: 199201
+    num_shards: 61
+  - config_name: institutions_roles
+    data_dir: institutions/roles
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: role_entity_id
+        dtype: int64
+      - name: role_type
+        dtype: string
+      - name: role_prefix
+        dtype: string
+    num_rows: 201446
+    num_bytes: 4351258
+    num_shards: 61
+  - config_name: institutions_topic_share
+    data_dir: institutions/topic_share
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: value
+        dtype: float64
+    num_rows: 3482471
+    num_bytes: 30081570
+    num_shards: 61
+  - config_name: institutions_topics
+    data_dir: institutions/topics
+    features:
+      - name: institution_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: count
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 3482471
+    num_bytes: 27627497
+    num_shards: 61
+  - config_name: sources_alternate_titles
+    data_dir: sources/alternate_titles
+    features:
+      - name: source_id
+        dtype: int64
+      - name: title
+        dtype: string
+    num_rows: 22877
+    num_bytes: 905217
+    num_shards: 42
+  - config_name: sources_apc_prices
+    data_dir: sources/apc_prices
+    features:
+      - name: source_id
+        dtype: int64
+      - name: price
+        dtype: float64
+      - name: currency
+        dtype: string
+    num_rows: 25021
+    num_bytes: 283365
+    num_shards: 42
+  - config_name: sources_counts_by_year
+    data_dir: sources/counts_by_year
+    features:
+      - name: source_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+      - name: oa_works_count
+        dtype: int64
+    num_rows: 1000731
+    num_bytes: 8405422
+    num_shards: 42
+  - config_name: sources_external_ids
+    data_dir: sources/external_ids
+    features:
+      - name: source_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 138631
+    num_bytes: 2618830
+    num_shards: 42
+  - config_name: sources_host_lineage
+    data_dir: sources/host_lineage
+    features:
+      - name: source_id
+        dtype: int64
+      - name: publisher_id
+        dtype: int64
+    num_rows: 23820
+    num_bytes: 378319
+    num_shards: 42
+  - config_name: sources_issns
+    data_dir: sources/issns
+    features:
+      - name: source_id
+        dtype: int64
+      - name: issn
+        dtype: string
+    num_rows: 57525
+    num_bytes: 1302945
+    num_shards: 42
+  - config_name: sources_societies
+    data_dir: sources/societies
+    features:
+      - name: source_id
+        dtype: int64
+      - name: organization
+        dtype: string
+      - name: url
+        dtype: string
+    num_rows: 3811
+    num_bytes: 280131
+    num_shards: 42
+  - config_name: sources_topic_share
+    data_dir: sources/topic_share
+    features:
+      - name: source_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: value
+        dtype: float64
+    num_rows: 204995
+    num_bytes: 3064924
+    num_shards: 42
+  - config_name: sources_topics
+    data_dir: sources/topics
+    features:
+      - name: source_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: count
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 204995
+    num_bytes: 2089180
+    num_shards: 42
+  - config_name: authors_concepts
+    data_dir: authors/concepts
+    features:
+      - name: author_id
+        dtype: int64
+      - name: concept_id
+        dtype: int64
+      - name: score
+        dtype: float64
+      - name: count
+        dtype: int64
+      - name: level
+        dtype: int32
+    num_rows: 772383165
+    num_bytes: 8907493756
+    num_shards: 688
+  - config_name: authors_counts_by_year
+    data_dir: authors/counts_by_year
+    features:
+      - name: author_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: works_count
+        dtype: int64
+      - name: cited_by_count
+        dtype: int64
+      - name: oa_works_count
+        dtype: int64
+    num_rows: 883778965
+    num_bytes: 3569671281
+    num_shards: 688
+  - config_name: authors_external_ids
+    data_dir: authors/external_ids
+    features:
+      - name: author_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 230981827
+    num_bytes: 2858151795
+    num_shards: 688
+  - config_name: authors_institutions
+    data_dir: authors/institutions
+    features:
+      - name: author_id
+        dtype: int64
+      - name: institution_id
+        dtype: int64
+    num_rows: 427101765
+    num_bytes: 1923414561
+    num_shards: 688
+  - config_name: authors_last_known_institutions
+    data_dir: authors/last_known_institutions
+    features:
+      - name: author_id
+        dtype: int64
+      - name: institution_id
+        dtype: int64
+    num_rows: 103777300
+    num_bytes: 954940491
+    num_shards: 688
+  - config_name: authors_name_alternatives
+    data_dir: authors/name_alternatives
+    features:
+      - name: author_id
+        dtype: int64
+      - name: display_name_alternative
+        dtype: string
+    num_rows: 392858113
+    num_bytes: 6044096512
+    num_shards: 688
+  - config_name: authors_sources
+    data_dir: authors/sources
+    features:
+      - name: author_id
+        dtype: int64
+      - name: source_id
+        dtype: int64
+      - name: is_core
+        dtype: bool
+      - name: is_in_doaj
+        dtype: bool
+    num_rows: 835250610
+    num_bytes: 4041979497
+    num_shards: 688
+  - config_name: authors_topic_share
+    data_dir: authors/topic_share
+    features:
+      - name: author_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: value
+        dtype: float64
+    num_rows: 544517049
+    num_bytes: 3739593865
+    num_shards: 688
+  - config_name: authors_topics
+    data_dir: authors/topics
+    features:
+      - name: author_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: count
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 544517049
+    num_bytes: 4270138942
+    num_shards: 688
+  - config_name: works_abstracts
+    data_dir: works/abstracts
+    features:
+      - name: work_id
+        dtype: int64
+      - name: abstract_inverted_index
+        dtype: string
+    num_rows: 248221431
+    num_bytes: 221145420894
+    num_shards: 2127
+  - config_name: works_authorship_institutions
+    data_dir: works/authorship_institutions
+    features:
+      - name: work_id
+        dtype: int64
+      - name: author_id
+        dtype: int64
+      - name: institution_id
+        dtype: int64
+    num_rows: 760634768
+    num_bytes: 11422205890
+    num_shards: 2127
+  - config_name: works_authorships
+    data_dir: works/authorships
+    features:
+      - name: work_id
+        dtype: int64
+      - name: author_id
+        dtype: int64
+      - name: author_position
+        dtype: string
+    num_rows: 960189908
+    num_bytes: 11780783633
+    num_shards: 2127
+  - config_name: works_awards
+    data_dir: works/awards
+    features:
+      - name: work_id
+        dtype: int64
+      - name: award_id
+        dtype: int64
+      - name: display_name
+        dtype: string
+      - name: funder_award_id
+        dtype: string
+      - name: funder_id
+        dtype: int64
+      - name: funder_display_name
+        dtype: string
+    num_rows: 79317425
+    num_bytes: 2805473012
+    num_shards: 2127
+  - config_name: works_concepts
+    data_dir: works/concepts
+    features:
+      - name: work_id
+        dtype: int64
+      - name: concept_id
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 4501395411
+    num_bytes: 32486361424
+    num_shards: 2127
+  - config_name: works_corresponding_authors
+    data_dir: works/corresponding_authors
+    features:
+      - name: work_id
+        dtype: int64
+      - name: author_id
+        dtype: int64
+    num_rows: 293212905
+    num_bytes: 4487890024
+    num_shards: 2127
+  - config_name: works_corresponding_institutions
+    data_dir: works/corresponding_institutions
+    features:
+      - name: work_id
+        dtype: int64
+      - name: institution_id
+        dtype: int64
+    num_rows: 181632080
+    num_bytes: 2120194663
+    num_shards: 2127
+  - config_name: works_counts_by_year
+    data_dir: works/counts_by_year
+    features:
+      - name: work_id
+        dtype: int64
+      - name: year
+        dtype: int32
+      - name: cited_by_count
+        dtype: int64
+    num_rows: 383642629
+    num_bytes: 2744668463
+    num_shards: 2127
+  - config_name: works_external_ids
+    data_dir: works/external_ids
+    features:
+      - name: work_id
+        dtype: int64
+      - name: source
+        dtype: string
+      - name: value
+        dtype: string
+    num_rows: 968222949
+    num_bytes: 16373399055
+    num_shards: 2127
+  - config_name: works_funders
+    data_dir: works/funders
+    features:
+      - name: work_id
+        dtype: int64
+      - name: funder_id
+        dtype: int64
+      - name: award_id
+        dtype: string
+    num_rows: 0
+    num_bytes: 1050738
+    num_shards: 2127
+  - config_name: works_indexed_in
+    data_dir: works/indexed_in
+    features:
+      - name: work_id
+        dtype: int64
+      - name: index_name
+        dtype: string
+    num_rows: 336380264
+    num_bytes: 2397345528
+    num_shards: 2127
+  - config_name: works_keywords
+    data_dir: works/keywords
+    features:
+      - name: work_id
+        dtype: int64
+      - name: keyword_id
+        dtype: string
+      - name: score
+        dtype: float32
+    num_rows: 2832660113
+    num_bytes: 28074665218
+    num_shards: 2127
+  - config_name: works_locations
+    data_dir: works/locations
+    features:
+      - name: work_id
+        dtype: int64
+      - name: source_id
+        dtype: int64
+      - name: is_oa
+        dtype: bool
+      - name: is_primary
+        dtype: bool
+      - name: license
+        dtype: string
+      - name: version
+        dtype: string
+    num_rows: 537965838
+    num_bytes: 5106323570
+    num_shards: 2127
+  - config_name: works_mesh
+    data_dir: works/mesh
+    features:
+      - name: work_id
+        dtype: int64
+      - name: descriptor_ui
+        dtype: string
+      - name: descriptor_name
+        dtype: string
+      - name: qualifier_ui
+        dtype: string
+      - name: qualifier_name
+        dtype: string
+      - name: is_major_topic
+        dtype: bool
+    num_rows: 1127251188
+    num_bytes: 15921498336
+    num_shards: 2127
+  - config_name: works_references
+    data_dir: works/references
+    features:
+      - name: work_id
+        dtype: int64
+      - name: referenced_work_id
+        dtype: int64
+    num_rows: 2912952343
+    num_bytes: 35367925096
+    num_shards: 2127
+  - config_name: works_related
+    data_dir: works/related
+    features:
+      - name: work_id
+        dtype: int64
+      - name: related_work_id
+        dtype: int64
+    num_rows: 2598276518
+    num_bytes: 18767817619
+    num_shards: 2127
+  - config_name: works_sdgs
+    data_dir: works/sdgs
+    features:
+      - name: work_id
+        dtype: int64
+      - name: sdg_id
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 174402726
+    num_bytes: 2039374831
+    num_shards: 2127
+  - config_name: works_topics
+    data_dir: works/topics
+    features:
+      - name: work_id
+        dtype: int64
+      - name: topic_id
+        dtype: int64
+      - name: score
+        dtype: float32
+    num_rows: 1007532780
+    num_bytes: 7612990305
+    num_shards: 2127
+---
+
+# OpenAlex Snapshot
+
+Mirror of the [OpenAlex](https://openalex.org) scholarly metadata snapshot — a free, open catalogue of 250M+ scholarly works, 100M+ authors, and related entities.
+
+Hosted on [HuggingFace](https://huggingface.co/datasets/Mearman/OpenAlex) via [Xet](https://xetdata.com) for content-addressable deduplication.
+
+**Source**: [s3://openalex](https://openalex.s3.amazonaws.com/) (public, anonymous S3 bucket)
+
+## Dataset subsets
+
+Each entity type is a separate subset (config):
+
+| Config | Description | Shards |
+|--------|-------------|--------|
+| `works` | Scholarly works (papers, datasets, etc.) | 2,127 |
+| `authors` | Authors of scholarly works | 738 |
+| `institutions` | Universities, research orgs | 61 |
+| `publishers` | Academic publishers | 51 |
+| `sources` | Journals, repositories, conferences | 42 |
+| `awards` | Grant/funding awards | 20 |
+| `concepts` | Legacy concept taxonomy (Wikidata) | 3 |
+| `topics` | Topic taxonomy | 1 |
+| `domains` | Top-level topic domains | 1 |
+| `fields` | Topic fields | 1 |
+| `subfields` | Topic subfields | 1 |
+| `funders` | Funding organisations | 1 |
+
+## Data format
+
+Each shard is a gzip-compressed JSON Lines file at:
+
+```
+data/{entity}/updated_date=YYYY-MM-DD/part_XXXX.jsonl.gz
+```
+
+The `.jsonl.gz` extension allows the HuggingFace dataset viewer to detect the inner format automatically. On S3, files are named `part_XXXX.gz`; the download pipeline renames them on save.
+
+Each line is a JSON object representing one entity record. Fields vary by entity type. See the [OpenAlex data model](https://docs.openalex.org/) for field definitions.
+
+### Example: Work record fields
+
+`id`, `doi`, `title`, `display_name`, `publication_year`, `type`, `language`, `authorships`, `concepts`, `topics`, `keywords`, `cited_by_count`, `referenced_works`, `related_works`, `locations`, `open_access`, `funders`, `awards`, `mesh`, `sustainable_development_goals`, `counts_by_year`, `updated_date`, and more.
+
+## Sync and extraction pipeline
+
+The `sync/` directory contains a Python pipeline for downloading from S3 and extracting relationship tables to Parquet:
+
+1. **Download**: `python3 -m sync.download sync [--entity X]` — syncs from `s3://openalex` (public, anonymous)
+2. **Extract**: `python3 -m sync.extract extract [--entity X] --workers 6` — converts `.jsonl.gz` to nested parquet sub-tables
+
+Extraction supports `--slice-index N --slice-total M` to partition work across machines.
+
+## Adding new entity types
+
+OpenAlex occasionally adds new entities. To support a new one:
+
+1. **Download**: `python3 -m sync.download sync --entity {entity}`
+2. **Schema**: Add entity + relationship schemas to `sync/schemas.py`
+3. **Extraction**: Add dispatch entry to `_ENTITY_DISPATCH` in `sync/extract.py`
+4. **Nesting**: Add singular→plural entry to `_ENTITY_SINGULAR_TO_PLURAL` in `sync/common.py`
+5. **Commit**: Stage and push
+
+## License
+
+OpenAlex data is released under [CC0 1.0 Universal](https://creativecommons.org/publicdomain/zero/1.0/). See the [OpenAlex terms](https://docs.openalex.org/about/the-data) for details.

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