{
  "schemaVersion": "crawler-atlas-1",
  "atlasVersion": "atlas-2026-07-28-v1",
  "canonical": "/atlas/semantic-html",
  "title": "Semantic HTML",
  "category": {
    "slug": "structure",
    "title": "Content structure for machines"
  },
  "definition": "Semantic HTML uses elements according to their meaning rather than only their visual appearance.",
  "mechanism": "Headings, articles, navigation, lists, tables, and links give parsers stable structural cues before statistical interpretation begins.",
  "validation": "Read the document outline and landmark structure without CSS, then compare extracted text order with the visible reading order.",
  "commonFailure": "A visually polished collection of generic div elements forces every downstream reader to reconstruct relationships from styling and position.",
  "related": [
    "/atlas/heading-hierarchy",
    "/atlas/structured-data"
  ],
  "modified": "2026-07-28"
}