{
  "type": "object",
  "title": "Presentation",
  "properties": {
    "title": {
      "type": "string"
    },
    "columns": {
      "type": "array",
      "title": "Columns",
      "items": {
        "type": "object",
        "title": "Column",
        "properties": {
          "id": {
            "type": "string"
          },
          "title": {
            "type": "string"
          },
          "params": {
            "$ref": "#/definitions/params"
          },
          "markdown": {
            "$ref": "#/definitions/markdown"
          },
          "slides": {
            "type": "array",
            "options": {
              "collapsed": "true"
            },
            "items": {
              "type": "object",
              "title": "Slide",
              "properties": {
                "id": {
                  "type": "string"
                },
                "title": {
                  "type": "string"
                },
                "params": {
                  "$ref": "#/definitions/params"
                },
                "markdown": {
                  "$ref": "#/definitions/markdown"
                }
              },
              "required": [
                "title",
                "params",
                "markdown"
              ]
            }
          }
        },
        "required": [
          "title",
          "params",
          "markdown"
        ]
      }
    }
  },
  "definitions": {
    "params": {
      "type": "object",
      "title": "Parameters",
      "options": {
        "collapsed": "true"
      },
      "properties": {
        "theme": {
          "type": "string",
          "title": "Theme",
          "enum": [
            "beige",
            "black",
            "blood",
            "league",
            "moon",
            "night",
            "serif",
            "simple",
            "sky",
            "solarized",
            "white"
          ],
          "default": "simple"
        },
        "background-image": {
          "$ref": "/choices/bg",
          "title": "Background image",
          "links": [
            {
              "rel": "Preview image",
              "class": "link-info",
              "href": "{{self}}"
            }
          ]
        },
        "background-opacity": {
          "type": "string",
          "title": "Background opacity",
          "enum": [
            "0.25",
            "0.5",
            "0.75",
            "1"
          ],
          "default": "0.5"
        },
        "background-size": {
          "type": "string",
          "title": "Background size",
          "enum": [
            "contain",
            "cover"
          ],
          "default": "cover"
        }
      }
    },
    "markdown": {
      "type": "string",
      "title": "Content",
      "format": "markdown"
    }
  }
}