Context
Wang and colleagues introduced SIEVE, a deep-research agent workflow combining fielded Boolean document filtering, ranked structure-rich result cards and selective section fetching.
What changed
SIEVE separates document eligibility from ranking and exposes titles, headings, sections and metadata as actionable retrieval fields. Its experiments compared this search–inspect–fetch approach with conventional whole-page Search–Visit systems.
Why it matters
Agentic discovery may depend on which parts of a source can be addressed and fetched, not just whether the page appears in a search index. Structured document access affects retrieval precision and context efficiency in the tested system.
Visibility OS interpretation
Visibility OS interprets SIEVE as controlled evidence for structure-aware agent retrieval, not evidence that a particular schema.org property or markup change increases live AI-search citations.
What remains uncertain
Will section-level retrieval gains reproduce on live, changing web corpora and consumer agents? How robust are Boolean constraints and fallback behavior across heterogeneous sites?