概要

YAML（是YAML Ain't Markup Language的缩写，尾音的发音类似Camel）是一种序列化数据的语言（类似json, xml），使用轻量高可读性的语法描述list, dict等数据结构。

可以把YAML看作一个比json更轻量易读的数据序列化表示语言，该语言使用缩进而不使用括号，在多层嵌套时有更好的可读性，也更有利于grep, awk等进行操作。

语法

略……

示例

相同的数据使用YAML与json表示，对比如下：

1. list

YAML

- Mark McGwire

- Sammy Sosa

- Ken Griffey

JSON

[

  "Mark McGwire",

  "Sammy Sosa",

  "Ken Griffey"

]

2. list type 2

YAML

[Mark McGwire, Tom Curry, Steve Thompson]

JSON

[

  "Mark McGwire",

  "Tom Curry",

  "Steve Thompson"

]

3. dict

YAML

hr:  65

avg: 0.278

rbi: 147

JSON

{

  "hr": 65,

  "avg": 0.27800000000000002,

  "rbi": 147

}

4. dict involve list

YAML

american:

  - Boston Red Sox

  - Detroit Tigers

  - New York Yankees

national:

  - New York Mets

  - Chicago Cubs

  - Atlanta Braves

JSON

{

  "american": [

    "Boston Red Sox",

    "Detroit Tigers",

    "New York Yankees"

  ],

  "national": [

    "New York Mets",

    "Chicago Cubs",

    "Atlanta Braves"

  ]

}

5. dict involve dict

YAML

Mark McGwire: {hr: 65, avg: 0.278}

Sammy Sosa: {

    hr: 63,

    avg: 0.288

  }

JSON

{

  "Sammy Sosa": {

    "hr": 63,

    "avg": 0.28799999999999998

  },

  "Mark McGwire": {

    "hr": 65,

    "avg": 0.27800000000000002

  }

}

6. list involve list

YAML

- [name        , hr, avg  ]

- [Mark McGwire, 65, 0.278]

- [Sammy Sosa  , 63, 0.288]

JSON

[

  [

    "name",

    "hr",

    "avg"

  ],

  [

    "Mark McGwire",

    65,

    0.27800000000000002

  ],

  [

    "Sammy Sosa",

    63,

    0.28799999999999998

  ]

]

Ref

Official Site

http://yaml.org/

Wiki

https://zh.wikipedia.org/zh-cn/YAML

YAML中文快速入门，有思维导图

http://www.cnblogs.com/chwkai/archive/2005/10/07/beginning_yaml.html

Online YAML parser (parse YAML to Json/XML)

https://yaml-online-parser.appspot.com/