{
  "schema_version": "1.0.0",
  "concept_id": "VIS-0006",
  "reviewed_on": "2026-09-15",
  "sources": [
    {
      "id": "src-met-primary",
      "title": "Primary Characteristics of Islamic Geometric Decoration",
      "publisher": "The Metropolitan Museum of Art",
      "url": "https://www.metmuseum.org/learn/educators/curriculum-resources/art-of-the-islamic-world/unit-three/primary-characteristics-of-islamic-geometric-decoration",
      "supports": "Repetition, mirroring, symmetry, and repeated design units in one documented art-historical context.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source media copied."
    },
    {
      "id": "src-met-essay",
      "title": "Geometric Patterns in Islamic Art",
      "publisher": "The Metropolitan Museum of Art",
      "url": "https://www.metmuseum.org/essays/geometric-patterns-in-islamic-art",
      "supports": "Art-historical context for geometric pattern, repetitive motifs, and symmetry.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source media copied."
    },
    {
      "id": "src-vam-print",
      "title": "Ink, Print, Repeat: A hands-on approach to early printed textiles",
      "publisher": "Victoria and Albert Museum",
      "url": "https://www.vam.ac.uk/blog/museum-life/ink-print-repeat-a-hands-on-approach-to-early-printed-textiles",
      "supports": "A museum-described hands-on account of isolating a motif and repeating it in early printed-textile study.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source media copied."
    },
    {
      "id": "src-vam-morris",
      "title": "William Morris and wallpaper design",
      "publisher": "Victoria and Albert Museum",
      "url": "https://www.vam.ac.uk/articles/william-morris-and-wallpaper-design",
      "supports": "Historical wallpaper-design and printing context, including complex block-printed repeats.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source media copied."
    },
    {
      "id": "src-cooper-wallpaper",
      "title": "Wallpaper in the collection of the Cooper-Hewitt Museum",
      "publisher": "Cooper Hewitt, Smithsonian Design Museum",
      "url": "https://www.cooperhewitt.org/publications/wallpaper-in-the-collection-of-the-cooper-hewitt-museum/",
      "supports": "Design-museum context for wallpaper and repeating surface pattern.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source media copied."
    },
    {
      "id": "src-ams",
      "title": "Existence and Properties of Reflections (preview)",
      "publisher": "American Mathematical Society",
      "url": "https://www.ams.org/bookstore/pspdf/amstext-51-prev.pdf",
      "supports": "Mathematical terminology for repeating plane patterns and wallpaper/crystallographic symmetry groups.",
      "status": "external_source_reviewed",
      "rights": "Linked reference only; no source PDF copied."
    },
    {
      "id": "src-pubmed-gestalt",
      "title": "A century of Gestalt psychology in visual perception",
      "publisher": "PubMed / Psychological Bulletin review",
      "url": "https://pubmed.ncbi.nlm.nih.gov/22845751/",
      "supports": "Review context for perceptual grouping principles such as proximity, similarity, continuation, closure, and symmetry.",
      "status": "external_source_reviewed",
      "rights": "Linked abstract/reference only; no article text copied."
    }
  ]
}