| ---
|
| configs:
|
| - config_name: default
|
| data_files:
|
| - split: train
|
| path: train.jsonl
|
| - split: test
|
| path: test.jsonl
|
| - split: queries
|
| path: test.jsonl
|
| - config_name: items
|
| data_files:
|
| - split: items
|
| path: items.jsonl
|
| ---
|
|
|
| # MovieLens Leave-One-Out
|
|
|
| Five chronological interactions predict the next interaction. One final test target per user; no rating filter. Histories are audit-only, not wholesale model inputs. Actors are supplementary; see actor_sources.json.
|
|
|
| ```json
|
| {
|
| "schema": "movie-fields-v1",
|
| "source": "official MovieLens 100K",
|
| "sample_policy": "leave-one-out-windows",
|
| "past_order": "oldest-first",
|
| "history_length": 5,
|
| "stride": 1,
|
| "shuffle_seed": 42,
|
| "timestamp_policy": "rating timestamp then original u.data row ordinal; ties are not verified watch order",
|
| "target_policy": "immediate next interaction, any rating; final interaction held out per user",
|
| "catalog_items": 1682,
|
| "split_counts": {
|
| "train": 94342,
|
| "test": 943
|
| },
|
| "history_rows": 943,
|
| "seen_items_filtered": false,
|
| "movies_with_actors": 1618,
|
| "actor_join_methods": {
|
| "unique_official_movielens_title_year_link_imdb_year_checked": 1268,
|
| "unique_title_adjacent_release_year_inferred": 56,
|
| "unique_imdb_title_year": 268,
|
| "unmatched": 31,
|
| "explicit_imdb_id_in_original_url": 53,
|
| "ambiguous_title_year": 6
|
| },
|
| "source_events": 100000,
|
| "users": 943,
|
| "users_too_short": 0,
|
| "timestamp_ties": 50561,
|
| "held_out_events_in_train": 0
|
| }
|
| ```
|
|
|
| ## Index-only plots
|
|
|
| Samples and metadata are unchanged. Select `--recommendation-index-content metadata-plot` to index `search_text`; the default still uses metadata-only `text`. Plots never enter histories. Keep plot_source attribution and its content license when distributing. See plot_enrichment.json for coverage and byte-identical files.
|
|
|
