{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://openeik.org/schemas/0.1/proposed/grain/layer-grain.schema.json",
  "$comment": "Proposed for OpenEik 0.2: Part II, 5.1.1, rule 1. Written by hand, not generated. In 0.1, a layer's grain is a member the type schema does not know, kept; a validator holds it to this schema only when asked for the proposal (@openeik/tools: proposals [\"grain\"]).",
  "title": "A layer's grain",
  "description": "The grain of a layer of a slab, wall, roof, ceiling or foundation type (Part II, 5.1.1, rule 1): along where its fibres, or a sheet's strong direction, run along the element's main direction, across where they run square to it in the layer's plane. A layer without it states none.",
  "type": "string",
  "enum": [
    "along",
    "across"
  ]
}