{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://openeik.org/schemas/0.1/proposed/grain/wall-main-direction.schema.json",
  "$comment": "Proposed for OpenEik 0.2: Part II, 5.1.1, rule 3. Written by hand, not generated. In 0.1, mainDirection is a member the element schema does not know, kept; a validator holds it to this schema only when asked for the proposal (@openeik/tools: proposals [\"grain\"]).",
  "title": "A wall's main direction",
  "description": "The direction its layers' grain is told from, in the wall's plane (Part II, 5.1.1, rule 3): vertical, up the wall, or horizontal, along its baseline; vertical where the wall gives none.",
  "type": "string",
  "enum": [
    "vertical",
    "horizontal"
  ]
}