This presentation gives a simple definition of the JSON format. The second part is about a comparison between xml and json

1. JSON
JavaScript Object Notation
By: Ibrahim Alibrahim (ibrah.ibra@gmail.com)
23 May 2015
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2. Outlines
 Introduction
 Example
 Some History
 Specification
 JSON vs. XML
 Conclusion
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3. JSON - Introduction
JSON is a light-weight alternative to XML for data-interchange
JSON = JavaScript Object Notation
◦ It’s really language independent
◦ most programming languages can easily read it and instantiate objects or some other data structure
Defined in RFC 4627
Started gaining tracking ~2006 and now widely used
http://json.org/ has more information
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4. Example
This is a JSON object with five key-value pairs
Objects are wrapped by curly braces
There are no object IDs
Keys are strings
Values are numbers, strings, objects or arrays
Arrays are wrapped by square brackets
{
"firstName": "John",
"lastName" : "Smith", "age" : 25,
"address" :
{
"streetAdr” : "21 2nd Street", "city" : "New York",
"state" : "NY", ”zip" : "10021“
},
"phoneNumber":
[
{"type" : "home", "number": "212 555-1234"},
{"type" : "fax", "number” : "646 555-4567"}
]
}
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5. Some History
1999:
ECMA-262
2002:
json.org
2006:
RFC-4627
2006:
AJAX
2013:
ECMA-404
2014:
RFC-7159
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 JSON has no version number.
 JSON is stable.

6. JSON Specification (BNF) - 1
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7. JSON Specification (BNF) - 2
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8. JSON Specification (BNF) - 3
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9. JSON Specification (BNF) - 4
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10. JSON vs. XML (Data Exchange Formats)
Criteria JSON XML
AJAX
The X in AJAX
JavaScript baby Needs more libraries
Namespaces No Yes
Input validation No Yes
Transmission time less more
Verbosity less more
Web services
REST SOAP
REST is more popular in
non-critical applications
SOAP is more reliable is business
applications
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11. JSON vs. XML (Case Study)
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 Comparison of JSON and XML Data Interchange Formats: A Case Study - Montana State
University – Bozeman
 Scenario 1: 1 million objects.
 Scenario 2: 5 samples (20000, 40000, 60000, 80000, 100000) objects with statistical analysis.
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12. JSON vs. XML (Case Study)
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13. Conclusion
 JSON is a light weight text format for data exchange.
 Simple BNF: objects, arrays, values (strings, numbers, null).
 JSON is much faster than XML in AJAX applications.
 REST + AJAX are the boosters of JSON.
 ADE should include JSON not only XML.
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Thank you