Getting start with JSON

JSON Schema is specification for JSON based formatting structure of JSON data. The JSON Schema specification is divided into three parts:

JSON Schema Core: The JSON Schema Core consists of terminology for a schema definition. This is similar to DOCTYPE declaration in HTML 4.01 and other older HTML versions. 

JSON Schema Validation: The JSON Schema Validation specifics valid ways to define validation constraints. 

JSON Hyper-Schema: It is another extension of JSON Schema spec, where hyperlink and hypermedia-related keywords are defined.

JSON Schema defines:

• describes existing data format
• human and machine-readable , clear documentation
• complete structural validation
• automated testing
• validating client-submitted data

JSON Schema example

{
	"title": "Schema Example",
	"type": "object",
	"properties": {
		"firstName": {
			"type": "string"
		},
		"lastName": {
			"type": "string"
		},
		
	},
	"required": ["firstName", "lastName"]
}

Below are the important keywords used in schema:

In next part we will explore some advantage of JSON over XML