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ABAP_JSON - Quick Overview JSON (JavaScript Object Notation) is a data exchange format whose syntax generally represents a subset of the JavaScript syntax. JSON data is stored and transported as character strings in a character format. The syntax of JSON consists of the following components:
Syntax characters
Curly brackets { } define objects.
Square brackets [ ] define arrays.
A colon : separates the name and the value of an object component.
A comma , separates the components inside arrays and objects.
Representation of values
Character-like values are specified between double quotation marks '...'. The character is used as the escape character for syntax characters.
Number values are represented in mathematical notation or in scientific notation.
Boolean values are represented by the keywords true and false.
Null values are represented by the keyword null.
Data structures
An array is an ordered list of values, arrays, or objects enclosed in square brackets [ ] and separated by commas ,, which do not need to have the same type. An empty array, [ ], is also possible.
An object is an ordered list of components enclosed in curly brackets { } and separated by commas ,. A component consists of a name specified in double quotation marks followed by a colon : followed by a value, array, or object.. An empty object, { }, is also possible. Unique names for the components of an object are recommended, but not mandatory. Empty space (blanks, line breaks) can be used anywhere before and after the syntax characters. At the top level, valid JSON data contains a single value, an array, or an object. Arrays and objects can contain further values, arrays, or objects.
Latest notes: In JavaScript, JSON data can be transformed to JavaScript objects directly using a built-in function eval due to its compatibility. In other programming languages, JSON data is read using parsers, which is also recommended for JavaScript for reasons of performance and security. NON_V5_HINTS ABAP_HINT_END
ABAP_EXAMPLES
The class CL_DEMO_JSON_EXAMPLES shows examples of valid JSON data.
The class CL_DEMO_JSON_SYNTAX_CHECK checks the syntax of freely entered JSON data. ABAP_EXAMPLE_END
