source is required in all cells

IPython/nbformat/v4/v4.withref.json

@@ -1,347 +1,347 b''
 {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "description": "IPython Notebook v4.0 JSON schema.",
     "type": "object",
     "additionalProperties": false,
     "required": ["metadata", "nbformat_minor", "nbformat", "cells"],
     "properties": {
         "metadata": {
             "description": "Notebook root-level metadata.",
             "type": "object",
             "additionalProperties": true,
             "properties": {
                 "kernel_info": {
                     "description": "Kernel information.",
                     "type": "object",
                     "required": ["name", "language"],
                     "properties": {
                         "name": {
                             "description": "Name of the kernel specification.",
                             "type": "string"
                         },
                         "language": {
                             "description": "The programming language which this kernel runs.",
                             "type": "string"
                         },
                         "codemirror_mode": {
                             "description": "The codemirror mode to use for code in this language.",
                             "type": "string"
                         }
                     }
                 },
                 "signature": {
                     "description": "Hash of the notebook.",
                     "type": "string"
                 },
                 "orig_nbformat": {
                     "description": "Original notebook format (major number) before converting the notebook between versions.",
                     "type": "integer",
                     "minimum": 1
                 }
             }
         },
         "nbformat_minor": {
             "description": "Notebook format (minor number). Incremented for backward compatible changes to the notebook format.",
             "type": "integer",
             "minimum": 0
         },
         "nbformat": {
             "description": "Notebook format (major number). Incremented between backwards incompatible changes to the notebook format.",
             "type": "integer",
             "minimum": 4,
             "maximum": 4
         },
         "cells": {
             "description": "Array of cells of the current notebook.",
             "type": "array",
             "items": {
                 "type": "object",
                 "oneOf": [
                     {"$ref": "#/definitions/raw_cell"},
                     {"$ref": "#/definitions/markdown_cell"},
                     {"$ref": "#/definitions/heading_cell"},
                     {"$ref": "#/definitions/code_cell"}
                 ]
             }
         }
     },
 
     "definitions": {
 
         "raw_cell": {
             "description": "Notebook raw nbconvert cell.",
             "type": "object",
             "additionalProperties": false,
-            "required": ["cell_type", "metadata"],
+            "required": ["cell_type", "metadata", "source"],
             "properties": {
                 "cell_type": {
                     "description": "String identifying the type of cell.",
                     "enum": ["raw"]
                 },
                 "metadata": {
                     "description": "Cell-level metadata.",
                     "type": "object",
                     "additionalProperties": true,
                     "properties": {
                         "format": {
                             "description": "Raw cell metadata format for nbconvert.",
                             "type": "string"
                         },
                         "name": {"$ref": "#/definitions/misc/metadata_name"},
                         "tags": {"$ref": "#/definitions/misc/metadata_tags"}
                     }
                 },
                 "source": {"$ref": "#/definitions/misc/source"}
             }
         },
 
         "markdown_cell": {
             "description": "Notebook markdown cell.",
             "type": "object",
             "additionalProperties": false,
-            "required": ["cell_type", "metadata"],
+            "required": ["cell_type", "metadata", "source"],
             "properties": {
                 "cell_type": {
                     "description": "String identifying the type of cell.",
                     "enum": ["markdown"]
                 },
                 "metadata": {
                     "description": "Cell-level metadata.",
                     "type": "object",
                     "properties": {
                         "name": {"$ref": "#/definitions/misc/metadata_name"},
                         "tags": {"$ref": "#/definitions/misc/metadata_tags"}
                     },
                     "additionalProperties": true
                 },
                 "source": {"$ref": "#/definitions/misc/source"}
             }
         },
 
         "heading_cell": {
             "description": "Notebook heading cell.",
             "type": "object",
             "additionalProperties": false,
             "required": ["cell_type", "metadata", "source", "level"],
             "properties": {
                 "cell_type": {
                     "description": "String identifying the type of cell.",
                     "enum": ["heading"]
                 },
                 "metadata": {
                     "description": "Cell-level metadata.",
                     "type": "object",
                     "properties": {
                         "name": {"$ref": "#/definitions/misc/metadata_name"},
                         "tags": {"$ref": "#/definitions/misc/metadata_tags"}
                     },
                     "additionalProperties": true
                 },
                 "source": {"$ref": "#/definitions/misc/source"},
                 "level": {
                     "description": "Level of heading cells.",
                     "type": "integer",
                     "minimum": 1,
                     "maximum": 6
                 }
             }
         },
 
         "code_cell": {
             "description": "Notebook code cell.",
             "type": "object",
             "additionalProperties": false,
             "required": ["cell_type", "metadata", "source", "outputs", "prompt_number"],
             "properties": {
                 "cell_type": {
                     "description": "String identifying the type of cell.",
                     "enum": ["code"]
                 },
                 "metadata": {
                     "description": "Cell-level metadata.",
                     "type": "object",
                     "additionalProperties": true,
                     "properties": {
                         "collapsed": {
                             "description": "Whether the cell is collapsed/expanded.",
                             "type": "boolean"
                         },
                         "autoscroll": {
                             "description": "Whether the cell's output is scrolled, unscrolled, or autoscrolled.",
                             "enum": [true, false, "auto"]
                         },
                         "name": {"$ref": "#/definitions/misc/metadata_name"},
                         "tags": {"$ref": "#/definitions/misc/metadata_tags"}
                     }
                 },
                 "source": {"$ref": "#/definitions/misc/source"},
                 "outputs": {
                     "description": "Execution, display, or stream outputs.",
                     "type": "array",
                     "items": {"$ref": "#/definitions/output"}
                 },
                 "prompt_number": {
                     "description": "The code cell's prompt number. Will be null if the cell has not been run.",
                     "type": ["integer", "null"],
                     "minimum": 0
                 }
             }
         },
         "output": {
             "type": "object",
             "oneOf": [
                 {"$ref": "#/definitions/execute_result"},
                 {"$ref": "#/definitions/display_data"},
                 {"$ref": "#/definitions/stream"},
                 {"$ref": "#/definitions/error"}
             ]
         },
         "execute_result": {
             "description": "Result of executing a code cell.",
             "type": "object",
             "additionalProperties": false,
             "required": ["output_type", "metadata", "prompt_number"],
             "properties": {
                 "output_type": {
                     "description": "Type of cell output.",
                     "enum": ["execute_result"]
                 },
                 "prompt_number": {
                     "description": "A result's prompt number.",
                     "type": ["integer"],
                     "minimum": 0
                 },
                 "application/json": {
                     "type": "object"
                 },
                 "metadata": {"$ref": "#/definitions/misc/output_metadata"}
             },
             "patternProperties": {
                 "^(?!application/json$)[a-zA-Z0-9]+/[a-zA-Z0-9\\-\\+\\.]+$": {
                     "description": "mimetype output (e.g. text/plain), represented as either an array of strings or a string.",
                     "$ref": "#/definitions/misc/multiline_string"
                 }
             }
         },
 
         "display_data": {
             "description": "Data displayed as a result of code cell execution.",
             "type": "object",
             "additionalProperties": false,
             "required": ["output_type", "metadata"],
             "properties": {
                 "output_type": {
                     "description": "Type of cell output.",
                     "enum": ["display_data"]
                 },
                 "application/json": {
                     "type": "object"
                 },
                 "metadata": {"$ref": "#/definitions/misc/output_metadata"}
             },
             "patternProperties": {
                 "^(?!application/json$)[a-zA-Z0-9]+/[a-zA-Z0-9\\-\\+\\.]+$": {
                     "description": "mimetype output (e.g. text/plain), represented as either an array of strings or a string.",
                     "$ref": "#/definitions/misc/multiline_string"
                 }
             }
         },
 
         "stream": {
             "description": "Stream output from a code cell.",
             "type": "object",
             "additionalProperties": false,
             "required": ["output_type", "metadata", "stream", "text"],
             "properties": {
                 "output_type": {
                     "description": "Type of cell output.",
                     "enum": ["stream"]
                 },
                 "metadata": {"$ref": "#/definitions/misc/output_metadata"},
                 "stream": {
                     "description": "The stream type/destination.",
                     "type": "string"
                 },
                 "text": {
                     "description": "The stream's text output, represented as an array of strings.",
                     "$ref": "#/definitions/misc/multiline_string"
                 }
             }
         },
 
         "error": {
             "description": "Output of an error that occurred during code cell execution.",
             "type": "object",
             "additionalProperties": false,
             "required": ["output_type", "metadata", "ename", "evalue", "traceback"],
             "properties": {
                 "output_type": {
                     "description": "Type of cell output.",
                     "enum": ["error"]
                 },
                 "metadata": {"$ref": "#/definitions/misc/output_metadata"},
                 "ename": {
                     "description": "The name of the error.",
                     "type": "string"
                 },
                 "evalue": {
                     "description": "The value, or message, of the error.",
                     "type": "string"
                 },
                 "traceback": {
                     "description": "The error's traceback, represented as an array of strings.",
                     "type": "array",
                     "items": {"type": "string"}
                 }
             }
         },
 
         "misc": {
             "metadata_name": {
                 "description": "The cell's name. If present, must be a non-empty string.",
                 "type": "string",
                 "pattern": "^.+$"
             },
             "metadata_tags": {
                 "description": "The cell's tags. Tags must be unique, and must not contain commas.",
                 "type": "array",
                 "uniqueItems": true,
                 "items": {
                     "type": "string",
                     "pattern": "^[^,]+$"
                 }
             },
             "source": {
                 "description": "Contents of the cell, represented as an array of lines.",
                 "$ref": "#/definitions/misc/multiline_string"
             },
             "prompt_number": {
                 "description": "The code cell's prompt number. Will be null if the cell has not been run.",
                 "type": ["integer", "null"],
                 "minimum": 0
             },
             "mimetype": {
                 "patternProperties": {
                     "^[a-zA-Z0-9\\-\\+]+/[a-zA-Z0-9\\-\\+]+": {
                         "description": "The cell's mimetype output (e.g. text/plain), represented as either an array of strings or a string.",
                         "$ref": "#/definitions/misc/multiline_string"
                     }
                 }
             },
             "output_metadata": {
                 "description": "Cell output metadata.",
                 "type": "object",
                 "additionalProperties": true
             },
             "multiline_string": {
                 "oneOf" : [
                     {"type": "string"},
                     {
                         "type": "array",
                         "items": {"type": "string"}
                     }
                 ]
             }
         }
     }
 }