json - Create a schema to check a column isn't null -

if have json table-like structure looks this:

{ "table": {     "rows": [         [ 0, null, 1, 2, null ],         [ null, 1, 2, 3, null ],         [ 1, 2, 3, null, null ],         [ null, null, 1, 2, 1 ]     ] } 

i can validate schema (note, i'm using draft 3 because that's library validating schema using, draft 4 might possible if go find different library):

{     "$schema": "http://json-schema.org/draft-03/schema#",     "title": "table data",     "description": "a table @ least 1 row of data 5 columns per row",     "type": "object",     "properties": {         "table" : {             "description" : "a table",             "type": "object",             "properties": {                 "rows": {                     "required" : true,                     "description": "an array of rows",                     "type" : "array",                     "minitems" : 1,                     "items" : {                         "type": "array",                         "minitems": 5,                         "maxitems": 5                     }                 }             },             "required":true         }     } } 

this checking have table, table has rows rows array @ least 1 item. rows arrays , arrays have 5 items (columns). easy enough.

what check is, each column (0...4) there exists at least 1 row value not null. possible express in json schema? or beyond can done it.