KCAE.SOURCE:4.3 - Separate finding units from reading units

Segment by intelligible source structure before imposing a token ceiling. Preserve parent headings, paragraph/list membership, table and figure ownership, explicit references and adjacent conditions. Split an oversized section into bounded retrieval units while leaving its reading unit intact. Overlap can reduce boundary losses, but blind overlap duplicates text and still does not recover a distant definition.

Give each unit a document/edition identity, a local locator, an exact source span where available and an expansion relation. Keep retrieval text, structural metadata and generated context in distinguishable fields. Record which parents or definitions a generated context used. That makes a later parent change capable of invalidating an apparently unchanged child representation.

Choose unit size using the retrieval question and the operation that consumes the hit. A broad research theme may benefit from section summaries; a protocol exception may need paragraph or cell retrieval. Keep an independent raw/full-body path so that summary selection is not the only way to reach the source. Test a question whose deciding text lies beyond the initial unit; the opening operation should recover it without requiring the user to guess its exact location.