File size: 1,949 Bytes
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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.
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