json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "definitions": {},
      "id": "http://json.formulasearchengine.com/schma/formulaList",
      "items": {
          "id": "/items",
          "properties": {
              "input": {
                  "id": "/items/properties/input",
                  "type": "string"
              },
              "inputhash": {
                  "description": "md5 hash of input",
                  "id": "/items/properties/inputhash",
                  "type": "string"
              },
              "type": {
                  "id": "/items/properties/type",
                  "pattern": "(LATEX|MATHML|MATH_TEMPLATE|MVAR_TEMPLATE|LATEXII|LATEXCE)",
                  "type": "string"
              }
          },
          "required": [
              "input",
              "inputhash"
          ],
          "type": "object"
      },
      "type": "array"
  }