{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://openeik.org/schemas/0.4/project/material-category.schema.json",
  "$comment": "OpenEik 0.3: folded by tools/fold-schemas-0.3.mjs from the proposal materialCategory, which 0.3 makes a rule (open questions, 121). Written by hand, not generated.",
  "title": "A material's category",
  "description": "What kind of material a material is (Part II, 4.2: one of a closed list, IFC 4's eleven recommended values of IfcMaterial's Category as they are and seven more, each defined in Part II, 4.2, rule 2. Engineered timber is wood.",
  "type": "string",
  "enum": [
    "concrete",
    "steel",
    "aluminium",
    "block",
    "brick",
    "stone",
    "wood",
    "glass",
    "gypsum",
    "plastic",
    "earth",
    "masonry",
    "metal",
    "mineralFibre",
    "bitumen",
    "ceramic",
    "mortar",
    "other"
  ]
}