{
  "schema_version": "1.0",
  "reviewed": "2026-09-01",
  "sources": [
    {
      "id": "us-dol-flsa-overtime",
      "publisher": "U.S. Department of Labor, Wage and Hour Division",
      "title": "Fact Sheet #23: Overtime Pay Requirements of the FLSA",
      "url": "https://www.dol.gov/agencies/whd/fact-sheets/23-flsa-overtime-pay",
      "used_for": [
        "time-card-calculator",
        "overtime-calculator",
        "shift-pay-calculator"
      ],
      "note": "Federal overtime background. Calculator thresholds and multipliers remain editable because coverage and state rules can differ."
    },
    {
      "id": "gaf-roofing-square",
      "publisher": "GAF",
      "title": "How Many Bundles of Shingles Are in a Square?",
      "url": "https://www.gaf.com/en-us/blog/your-home/how-many-bundles-of-shingles-are-in-a-square---63a47862-f7e1-4e73-abcf-8d09917a8b8d",
      "used_for": [
        "roof-material-takeoff-calculator",
        "roofing-squares-calculator",
        "shingle-bundles-calculator"
      ],
      "note": "Background for roofing squares, bundle planning and waste ranges. Product-specific coverage remains editable where relevant."
    },
    {
      "id": "quikrete-yield",
      "publisher": "QUIKRETE",
      "title": "Concrete & Cement Mixes Training / approximate bag yields",
      "url": "https://www.quikrete.com/dealers/training/presentations/3-mixing-placing-concrete-cement-mixes-training.pdf",
      "used_for": [
        "concrete-slab-calculator",
        "concrete-bag-calculator",
        "post-hole-concrete-calculator"
      ],
      "note": "Manufacturer reference for common packaged concrete yields."
    },
    {
      "id": "sherwin-williams-coverage",
      "publisher": "Sherwin-Williams",
      "title": "Paint Calculator",
      "url": "https://www.sherwin-williams.com/en-us/color/color-tools/paint-calculator",
      "used_for": [
        "room-paint-calculator",
        "paint-coverage-calculator"
      ],
      "note": "Background for common paint coverage assumptions; actual product coverage can vary."
    },
    {
      "id": "rfc-9727-api-catalog",
      "publisher": "IETF / RFC Editor",
      "title": "RFC 9727: The api-catalog Link Relation",
      "url": "https://www.rfc-editor.org/rfc/rfc9727.html",
      "used_for": [
        "api-catalog",
        "agent-discovery"
      ],
      "note": "Protocol basis for the public API catalog discovery surface."
    },
    {
      "id": "w3c-prov",
      "publisher": "World Wide Web Consortium (W3C)",
      "title": "PROV Overview",
      "url": "https://www.w3.org/TR/prov-overview/",
      "used_for": [
        "provenance"
      ],
      "note": "Conceptual model for publishing information about entities and activities involved in producing data or artifacts."
    }
  ]
}