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My interest in JSON is two-fold, the association with AJAX and the fact that I was getting a JSON error when I was downloading a report or statement from a website that I use. I cannot remember what site at the moment.

The file was doLogin.json and it contained {"redirect":"summary.html"} - so I think it was what I thought above. Probably a programming error on the site I was downloading it from.

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What json.org say:

" JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language. "

Data Structures:

Quite frankly, when I looked at the pages on json.org and Douglas' site I was a little intimidated by the diagrams. on more introspection I am not sure how it could have been done differently. The structure of a JSON file can take many forms but there is a specification on how they are formatted.

A JSON Object

For example, the first definition on json.org:

" An object is an unordered set of name/value pairs. An object begins with {left brace and ends with }right brace. Each name is followed by :colon and the name/value pairs are separated by ,comma. "

An example of this:

var books = [
{
"title": "Cracking the coding interview",
"subtitle":"189 programming questions and solutions",
"author":"Gayle Laakmann McDowell",
"category":"Programming",
"publisher":"CareerCup, LLC"
},
{
"title": "No friend but the mountains",
"subtitle":"Writing from manu prison",
"author":"Behrouz Boochani",
"category":"Literature",
"publisher":"Pan Macmillan Australia"
},
.............................. more data ]

The example data above is from my page on a search page of a list of books that is built as a JSON Object.

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