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What is a YAML .yml file?
YAML, which stands for “YAML Ain’t Markup Language,” is a human-readable data serialization format. It is commonly used for configuration files and data storage, allowing for easy representation of data structures. The file extension for YAML files is typically .yml.
YAML files are designed to be easily readable by both humans and machines. They provide a simple and concise way to represent complex data structures, such as lists, dictionaries, and objects, using plain text.
Basic Concepts of YAML
1. Indentation and Hierarchy: YAML uses indentation to define the structure of the data. Indentation is done using spaces and must be consistent throughout the file. The indentation creates a hierarchical representation of the data.
2. Key-Value Pairs: YAML uses key-value pairs to represent data. Each key is followed by a colon and the corresponding value. The key-value pairs can be used to define properties and their corresponding values.
3. Arrays and Lists: YAML supports arrays and lists. Arrays are represented using square brackets [], and individual elements are separated by commas. Arrays allow for the representation of multiple values under a single key.
4. Objects and Dictionaries: YAML provides the ability to define complex data structures using objects and dictionaries. Dictionaries are represented using curly braces {}, and key-value pairs are used to define properties within the dictionary.
5. Comments: YAML allows for comments within the file using the ‘#’ symbol. Comments are useful for adding explanatory notes or disabling specific sections of the file.
Example YAML File:
Let’s consider an example YAML file representing information about a person:
“`
# Example YAML .yml file
name: John Doe
age: 30
address:
street: 123 Main Street
city: Anytown
country: USA
interests:
– reading
– hiking
– photography
“`
In the above example, we have defined the person’s name, age, address, and interests using the YAML syntax. The address and interests sections demonstrate the hierarchical representation provided by YAML.
In summary, a YAML .yml file is a human-readable and machine-parsable data serialization format that allows for efficient representation of complex data structures. It is commonly used for configuration files, data exchange, and storage. Its simplicity and readability make it a popular choice in various applications.
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