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Human Capital Sense

Learning path · Embeddings & Representation · 41

Structure-Aware Chunking

Splitting along document structure—headings, tables, slides, code blocks—so chunks respect logical units and metadata.

Why it matters

  • Essential for wikis, APIs docs, and regulated manuals.
  • Enables citations that point to sections users recognize.
  • Pairs with GraphRAG for hierarchical knowledge.

Key ideas

  • Heading paths
  • Table row units
  • Code function blocks

Top resources

  1. 01DocsLlamaIndex

    Node parsers / chunking

    Why this resource. Headings, code, and tables as first-class split points.

    Covers in this concept

    • document structure
    • node parsers
  2. 02ArticleAnthropic

    Contextual retrieval

    Why this resource. Why structure in the chunk beats a raw 512-token window.

    Covers in this concept

    • contextual retrieval

Video

Structure-aware chunking uses HTML, Markdown, PDF outlines, or OCR layout to never split mid-table or mid-procedure step. Compared to semantic chunking, it trusts author structure over statistical breakpoints—superior for SOPs and reference docs. Compared to late chunking, it is cheaper and easier to explain in audits. Attach breadcrumb metadata (H1 > H2 > H3) to each chunk for filtering and user-facing citations. Sync heading metadata when wikis rename sections; stale breadcrumbs confuse both users and ACL filters tied to path prefixes.

Updated 2026-08-09 · Full learning path