Dataset Viewer
The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code: StreamingRowsError
Exception: CastError
Message: Couldn't cast
authorities: struct<>
first_release: bool
profile: string
pointer_version: int64
manifest: struct<path: string, sha256: string, size: int64>
child 0, path: string
child 1, sha256: string
child 2, size: int64
release: string
profiles: struct<core: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned (... 114 chars omitted)
child 0, core: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned: string>
child 0, db_size: int64
child 1, gz_size: int64
child 2, sha256_db: string
child 3, sha256_gz: string
child 4, url_pinned: string
child 1, full: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned: string>
child 0, db_size: int64
child 1, gz_size: int64
child 2, sha256_db: string
child 3, sha256_gz: string
child 4, url_pinned: string
compat_fingerprint: string
release_commit: string
normalize_version: string
schema_version: int64
indexes: struct<core: struct<sha256: string, url_pinned: string>, full: struct<sha256: string, url_pinned: st (... 6 chars omitted)
child 0, core: struct<sha256: string, url_pinned: string>
child 0, sha256: string
child 1, url_pinned: string
child 1, full: struct<sha256: string, url_pinned: string>
child 0, sha256: string
child 1, url_pinned: string
to
{'compat_fingerprint': Value('string'), 'indexes': {'core': {'sha256': Value('string'), 'url_pinned': Value('string')}, 'full': {'sha256': Value('string'), 'url_pinned': Value('string')}}, 'manifest': {'path': Value('string'), 'sha256': Value('string'), 'size': Value('int64')}, 'normalize_version': Value('string'), 'pointer_version': Value('int64'), 'profiles': {'core': {'db_size': Value('int64'), 'gz_size': Value('int64'), 'sha256_db': Value('string'), 'sha256_gz': Value('string'), 'url_pinned': Value('string')}, 'full': {'db_size': Value('int64'), 'gz_size': Value('int64'), 'sha256_db': Value('string'), 'sha256_gz': Value('string'), 'url_pinned': Value('string')}}, 'release': Value('string'), 'release_commit': Value('string'), 'schema_version': Value('int64')}
because column names don't match
Traceback: Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2840, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2373, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2398, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
self._cast_table(pa_table, json_field_paths=json_field_paths),
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
pa_table = table_cast(pa_table, self.info.features.arrow_schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
authorities: struct<>
first_release: bool
profile: string
pointer_version: int64
manifest: struct<path: string, sha256: string, size: int64>
child 0, path: string
child 1, sha256: string
child 2, size: int64
release: string
profiles: struct<core: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned (... 114 chars omitted)
child 0, core: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned: string>
child 0, db_size: int64
child 1, gz_size: int64
child 2, sha256_db: string
child 3, sha256_gz: string
child 4, url_pinned: string
child 1, full: struct<db_size: int64, gz_size: int64, sha256_db: string, sha256_gz: string, url_pinned: string>
child 0, db_size: int64
child 1, gz_size: int64
child 2, sha256_db: string
child 3, sha256_gz: string
child 4, url_pinned: string
compat_fingerprint: string
release_commit: string
normalize_version: string
schema_version: int64
indexes: struct<core: struct<sha256: string, url_pinned: string>, full: struct<sha256: string, url_pinned: st (... 6 chars omitted)
child 0, core: struct<sha256: string, url_pinned: string>
child 0, sha256: string
child 1, url_pinned: string
child 1, full: struct<sha256: string, url_pinned: string>
child 0, sha256: string
child 1, url_pinned: string
to
{'compat_fingerprint': Value('string'), 'indexes': {'core': {'sha256': Value('string'), 'url_pinned': Value('string')}, 'full': {'sha256': Value('string'), 'url_pinned': Value('string')}}, 'manifest': {'path': Value('string'), 'sha256': Value('string'), 'size': Value('int64')}, 'normalize_version': Value('string'), 'pointer_version': Value('int64'), 'profiles': {'core': {'db_size': Value('int64'), 'gz_size': Value('int64'), 'sha256_db': Value('string'), 'sha256_gz': Value('string'), 'url_pinned': Value('string')}, 'full': {'db_size': Value('int64'), 'gz_size': Value('int64'), 'sha256_db': Value('string'), 'sha256_gz': Value('string'), 'url_pinned': Value('string')}}, 'release': Value('string'), 'release_commit': Value('string'), 'schema_version': Value('int64')}
because column names don't matchNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
LCSH lite — SQLite databases of Library of Congress authorities
Small SQLite databases built from the Library of Congress bulk authority files (id.loc.gov), for offline lookup in the LCSH Recommendation Tool.
| Profile | Authorities | Download | On disk |
|---|---|---|---|
core |
LCSH (subjects) + LCGFT (genre/form) | about 62 MB | about 205 MB |
full |
core + LCNAF (names) | about 1.9 GB | about 5.4 GB |
How to use a release
Read latest.json at the repository root. It names the current release and,
for each profile, a url_pinned download link fixed to one commit, plus the
SHA-256 of the gzip file and of the database inside it. Check both hashes
before you use a file. Every release lives under releases/<release>/ and is
never changed after it is published.
Contents and rules
- Built by
lcsh-db-builderfromsubjects,genreFormsandnamesSKOS bulk files, with MARC keys from the subjects and genreForms MADS files. - Subdivision records (
-781forms and 18X free-floating subdivisions) are not included; they are not valid main headings. - Name records have no MARC key in these databases; look them up online.
- The schema and the exact supported queries are documented in the builder
repository (
docs/SCHEMA.md,docs/SCHEMA_QUERIES.md).
Licence
The data comes from the Library of Congress and is in the public domain in the United States. See https://www.loc.gov/legal/ and id.loc.gov.
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