{
  "title": "Ryerson Metal Product",
  "description": "Structure of an industrial metal product in Ryerson's catalog",
  "fields": [
    {
      "name": "productId",
      "type": "string",
      "required": true,
      "description": "Unique product identifier"
    },
    {
      "name": "sku",
      "type": "string",
      "required": false,
      "description": "Stock keeping unit identifier"
    },
    {
      "name": "name",
      "type": "string",
      "required": false,
      "description": "Product name and description"
    },
    {
      "name": "material",
      "type": "string",
      "required": true,
      "description": "Metal type: stainless_steel, aluminum, carbon_steel, alloy_steel, nickel, copper, brass"
    },
    {
      "name": "grade",
      "type": "string",
      "required": false,
      "description": "Material grade (e.g., 304 stainless, 6061-T6 aluminum, A36 carbon steel)"
    },
    {
      "name": "form",
      "type": "string",
      "required": true,
      "description": "Physical form: sheet, plate, bar, tube, pipe, coil, structural, etc."
    },
    {
      "name": "dimensions",
      "type": "object",
      "required": false,
      "description": "Physical dimensions in inches/feet",
      "fields": [
        {"name": "thickness", "type": "number"},
        {"name": "width", "type": "number"},
        {"name": "length", "type": "number"},
        {"name": "diameter", "type": "number"}
      ]
    },
    {
      "name": "unit",
      "type": "string",
      "required": false,
      "description": "Unit of measure: pound, foot, piece, sheet"
    },
    {
      "name": "pricePerUnit",
      "type": "number",
      "required": false,
      "description": "Price per unit in USD"
    },
    {
      "name": "availability",
      "type": "string",
      "required": false,
      "description": "Availability: in_stock, call_for_availability, special_order"
    }
  ]
}