json schema to validate datetime is after unix epoch or not

[sampa...@gmail.com]

Hi All

I am new to json , I want to write a json schema which accepts array of time stamps in ISO8061 standard and make sure that the time is after unix epoch i.e 1 January 1970 00:00:00

the date-time in json-schema is making sure that time is ISO8061 standard but it i could not able add constraint that the time should be after unix epoch i.e 1 January 1970 00:00:00

my json shema :

{  "$schema": "http://json-schema.org/draft-04/schema#",
   "type" : "array", // array of time stamps 
   "items" : { 

        "type": "string",
        "format": "date-time"
    }  
}

json data

["1954-12-11T00:00:00Z"]

Could you please let us know is there any we can a constrain on time filed at schema level that date-time provided should be after unix epoch i.e 1 January 1970 00:00:00

Thank you

Sampath

[Joe McIntyre]

Sampath,

A regular expression can be added to the validation as shown below,

{

  "$schema":"http://json-schema.org/draft-04/schema#",

  "type" : "array",

   "items" : { 

     "type": "string",

     "format": "date-time",

     "pattern": "^(19[7-9]|2[0-9][0-9])[0-9]"

  }  

}

This is generate an error if the date is before the epoch date.

The regular expression checks the first four characters in the string for >= 1970.