Source refs

A context_source_ref preserves where a context item came from and how to locate or verify it again.

Selector types

Initial selector types: text_quote, text_position, byte_range, line_range, json_pointer, css_selector, xpath, page_region, media_time_range, artifact_part, message_part, and custom.

Recommended fields

Use source_id, uri, source_kind, selector, digest, authority, provenance_refs, external_mappings, license, retrieved_at, and modified_at.

Fixed rule

A source ref should remain useful after context is summarized, redacted, exported, or reviewed. If the original source cannot be shared, preserve a digest and a redacted locator.