YAML

YAML is a data serialization language designed to be human-friendly and work well with modern programming languages for common everyday tasks. Additionally any valid JSON document is also a valid YAML document.

Syntax

Indentation:

Indentation is used to represent the structure of the data. Spaces or tabs can be used, but consistency is crucial.

Key-Value Pairs:

Data is represented as key-value pairs using a colon (:) to separate the key and value.

Comments:

Comments can be made with # symbol.

key: value # My Comment
# Another comment

Lists / Sequences:

Lists are represented using a hyphen (-) followed by a space.

key: value
list:
- item1
- item2

Mappings:

Mappings represent key-value pairs.

key: value
nested:
	key: value

Data Types

YAML support many different data types such as strings, numbers and booleans.

mystr: "Hello World"
mynum: 3
myfloat: 3.1415
mybool: true
multiline: |
	hello world
	this is multiline
key: value

Common Use Cases

1. Configuration Files:

YAML is widely used for configuration files in applications and systems.

3. CI/CD Pipelines:

Many CI/CD tools, such as GitLab CI and GitHub Actions, use YAML for defining pipelines.