YAML（Yet Another Markup Language）(Pronunciation /ˈjæməl/ )
A programming language based on Unicode that is easy to read and easy to interact with scripting languages, and is used to express data sequences.
Adapt to scenarios Scripting language: Due to the simple implementation and low parsing cost, YAML is particularly suitable for use in scripting languages Serialization: YAML is directed by the host language data type, which is more suitable for serialization. Configuration file: Writing YAML is much faster than writing XML (no need to pay attention to tags or quotes), and is more than INIdocumentMore powerful. Due to compatibility issues, it is recommended not to use YAML for data flow between different languages. Language Advantages YAML is easy to read. YAML data is portable between programming languages. YAML matches native data structures for agile languages. YAML has a consistent model to support common tools. YAML supports one-way processing. YAML is expressive and scalable. YAML is easy to implement and use. YAML syntax Use space Space indentation to represent hierarchy. Different numbers of spaces can be used for indentation between different levels, but elements of the same layer must be left-aligned, that is, the number of spaces in front is the same (the Tab cannot be used, and the number of spaces corresponding to the Tab in each system may be different, resulting in hierarchy confusion) '#' represents comments, and can only be commented on one line, from the beginning of # to the end of the line, followed by a dash (a dash and space) meansListKey-value pairs are represented by colons and spaces. key: value Simple data (scalars, scalar data) can be enclosed without quotation marks, including string data. Enclosed in single or double quotes is treated as string data, and C-style escaped characters are used in single or double quotes Sequence of Scalars Simple data list
- Mark McGwire - Sammy Sosa - Ken Griffey
Mapping Scalars to Scalars Simple data key-value pairs and comments
hr: 65 # Home runs avg: 0.278 # Batting average rbi: 147 # Runs Batted In
Mapping Scalars to Sequences Simple data list key-value pairs
american: - Boston Red Sox - Detroit Tigers - New York Yankees national: - New York Mets - Chicago Cubs - Atlanta Braves
Sequence of Mappings Key-value pair list
- name: Mark McGwire hr: 65 avg: 0.278 - name: Sammy Sosa hr: 63 avg: 0.288
YAML also supports stream types, enclosed in brackets to represent lists and separated elements with commas; enclosed in brackets to represent key-value pairs and separated elements with commas.
Sequence of Sequences List
- [name , hr, avg ] - [Mark McGwire, 65, 0.278] - [Sammy Sosa , 63, 0.288]
Mapping of Mappings Key-value pairs
Mark McGwire: {hr: 65, avg: 0.278} Sammy Sosa: { hr: 63, avg: 0.288 }
Adapt to the scene
Scripting language: Due to its simple implementation and low parsing cost, YAML is particularly suitable for use in scripting languages.
Serialization: YAML is directed by the host language data type, which is more suitable for serialization.
Configuration File: Writing YAML is much faster than writing XML (no need to pay attention to tags or quotes), and is more powerful than INI documentation. Due to compatibility issues, it is recommended not to use YAML for data flow between different languages.
Language Advantages
YAML is easy for people to read.
YAML data is portable between programming languages.
YAML matches native data structures for agile languages.
YAML has a consistent model to support common tools.
YAML supports one-way processing.
YAML is expressive and scalable.
YAML is easy to implement and use.
YAML syntax
Use space Space indentation to represent hierarchy. Different numbers of spaces can be used for indentation between different levels, but elements of the same layer must be left-aligned, that is, the number of spaces in front is the same (the Tab cannot be used, and the number of spaces corresponding to the Tabs in each system may be different, resulting in hierarchy confusion)
‘#’ means comments, only single line comments, from the beginning of # to the end of line
A dash and space are followed by a dash and space to represent the list
Use colons and spaces to represent key-value pairs key: value
Simple data (scalars, scalar data) can be enclosed without quotes, including string data. Enclosed in single or double quotes is treated as string data, and C-style escape characters are used in single or double quotes.
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Author: beginya
Source: CSDN
Original text: /beginya/article/details/76768968
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