| # Data dictionary |
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| Version 1.1.0. `data-dictionary.json` holds the same descriptions in machine-readable form. |
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| `id` and `user_id` are local keys of this dataset. `github_id` and `repository_id` are |
| GitHub's numeric IDs. `crosswalk.sql` defines a view that adds owner logins, repository |
| names and URLs to every repository row. |
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| Biographies, company, location, external links and the counts of followed accounts, |
| organizations and sponsors were in the source database and are not released. |
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| All columns are nullable in the Parquet schema. NULL values occur only in |
| `followers_count`, `concentration`, `effective_breadth` and `exclusion_reason`. |
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| ## `users` |
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| One row per account. 3,671,497 rows. |
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| | Field | Type | Meaning | |
| | --- | --- | --- | |
| | `id` | integer | Local key of the account in this dataset. Not the GitHub ID | |
| | `github_id` | integer | GitHub's numeric ID of the account | |
| | `github_name` | string | Login stored at collection time. The account may have been renamed since | |
| | `created_at` | string | Time the collector inserted the account (8 or 9 December 2025). Not the GitHub registration date | |
| | `last_updated` | string | Time of the collector's last update of the account, or the placeholder 6200-01-01. Not the time the repositories were fetched | |
| | `h_index` | integer | h-index stored by the collector. portfolios.h_observed recomputes it from the repository rows | |
| | `repositories_fetched` | integer | Raw collector flag: 1 after a repository fetch ended, -1 while one was in progress | |
| | `followers_count` | integer | Follower count. NULL when profile_available is false | |
| | `followers_count_raw` | integer | Follower count as stored. When profile_available is false it is a default value, not an observed count | |
| | `retrieval_status` | string | Repository retrieval class derived from the collector's flags: complete, failed or unknown. Not checked against GitHub | |
| | `profile_available` | boolean | False when the stored biography is NULL or all stored profile fields are defaults. The follower count is then treated as missing | |
| | `bio_was_null` | boolean | True when the stored biography was NULL. The biography text is not released | |
| | `profile_default_signature` | boolean | True when the stored profile fields all had their default values | |
| | `retrieval_inference_basis` | string | How retrieval_status was derived. Always collector_code_inference | |
| | `retrieval_evidence_ref` | string | Location in the collector source that supports the class | |
| | `rowset_completeness_independently_certified` | boolean | Always false. No account's repository list was checked against GitHub | |
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| ## `repositories` |
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| One row per repository under one account. 53,990,808 rows. |
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| | Field | Type | Meaning | |
| | --- | --- | --- | |
| | `id` | integer | Local key of the row | |
| | `user_id` | integer | Local key of the owner. Joins users.id | |
| | `repository_id` | integer | GitHub's numeric ID of the repository. Twenty IDs appear under more than one account | |
| | `name` | string | Repository name as stored | |
| | `created_at` | string | Creation time of the repository on GitHub. Not the time it was fetched | |
| | `stars` | integer | Star count when the repository was fetched | |
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| ## `portfolios` |
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| One row per account, computed from its repository rows. 3,671,497 rows. |
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| | Field | Type | Meaning | |
| | --- | --- | --- | |
| | `user_id` | integer | Local key of the account. Joins users.id | |
| | `github_id` | integer | GitHub's numeric ID of the account | |
| | `n_repositories` | integer | Number of stored repository rows of the account, including repositories with no stars | |
| | `total_stars` | integer | Sum of stars over those rows | |
| | `max_stars` | integer | Largest star count among those rows. 0 for an account with no rows | |
| | `sum_squared_stars` | integer | Sum of squared star counts over those rows | |
| | `h_observed` | integer | h-index recomputed from the repository rows | |
| | `h_stored` | integer | h-index stored by the collector (users.h_index) | |
| | `starred_repositories` | integer | Number of rows with at least one star | |
| | `concentration` | float | Sum of squared star shares (Herfindahl index). NULL when total_stars is 0 | |
| | `effective_breadth` | float | 1 / concentration. NULL when total_stars is 0 | |
| | `retrieval_status` | string | Same as users.retrieval_status | |
| | `profile_available` | boolean | Same as users.profile_available | |
| | `valid_portfolio` | boolean | True when the account's rows passed the structural checks. It says nothing about completeness | |
| | `eligible` | boolean | True when retrieval_status is complete. The reuse examples use these accounts | |
| | `exclusion_reason` | string | Why the account is left out of the reuse examples. NULL for accounts that are used. All rows stay in the release | |
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