This is a image version of the post here

range-set:

range-set   ::= range ( logical-or range )*

logical-or:

logical-or  ::= ' '* '||' ' '*

referenced by: range-set

range:

To see the syntax and Railroad diagram version, goto here

Basic Structure

Package dependecies are a tuple of [major, minor, patch] with numeric values.

{
    "name": "project name",
    "version": "0.0.1",
    "description": "description of the project",
    "keywords": [
        "keyword 1",
        "keyword 2"
    ],
    "author": "John Doe",
    "dependencies": {
      "package-1": "~0.6.2",
      "package-2": ">=2.6.2"
    }
}

Version Range operator

Basic Range

For x in exmaple, see Advanced Range below.

Operator	Explaination	Example
=	package version must be exactly matched	1.0.0 := =1.0.0 (They are equivalent)
<	package version must be less than indicated	<2.0.0 :=version from 0.0.1 to 1.x.x
<=	package version must be less than or euqal to indicated	<=2.0.0 :=version from 0.0.1 to 2.0.0
>	package version must be greater than indicated	>2.0.0:= version from 2.0.1 to x (x >= 2)
>=	package version must be greater than or euqal to indicated	>=2.0.0 :=version from 2.0.0 to x (x >= 2)
||	joined one or more operator	>2.0.1 || <1.7.3 :=version greater than 2.0.1 or less than 1.7.3
space	Intersected one or more operator	>=2.0.1 <=1.7.3 :=version from 2.0.1 to 1.7.3 (inclusive)

Advanced Range

Advanced ranges may be combined in the same way as primitive comparators using space or ||.