FrozenDocumentLoader serves only URLs in an allowlist and refuses all other
document loads. It is intended for air-gapped runs, reproducible builds, and
deployments that must avoid remote context fetching.
With no arguments, the loader serves the curated BUNDLED_CONTEXTS mapping:
{{ example('document_loaders/frozen_default.py', output_syntax='json') }}
{{ bundled_contexts_table() }}
Extend the bundled mapping with additional vetted contexts:
{{ example('document_loaders/frozen_extend.py', output_syntax='json') }}
The documents mapping may contain parsed JSON-LD dictionaries or
pathlib.Path instances pointing to JSON files. Path entries are read lazily
and cached after the first request.
Any URL outside the allowlist raises JsonLdError with code
loading document failed.