{
  ...
  "properties": {
    ...
    "schematics": {
      "$ref": "#/definitions/schematicOptions"
    },
    ...
    "projects": {
      "type": "object",
      "patternProperties": {
        "^[a-zA-Z][.0-9a-zA-Z]*(-[.0-9a-zA-Z]*)*$": {
          "$ref": "#/definitions/project"
        }
      },
      "additionalProperties": false
    }
  },
  ...
  "definitions": {
    ...
    "schematicOptions": {...},
    ...
    "project": {...},
    ...
  }
}