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Project Notes

About YAML

Notes on structure, generation and validation of YAML.


YAML is a human-readable data-serialization language, commonly used for configuration files.

Core format features:

  • Python-style indentation for nesting
  • natively encodes scalars (strings, integers, and floats)
  • uses ‘[]’ for lists
  • users ‘{}’’ for maps

Some Examples

See ./examples for some example YAML files.

The script test_examples.rb can be used to test all the example files.

$ ./test_examples.rb
Run options: --seed 36493

# Running:


Finished in 0.001647s, 1821.4937 runs/s, 5464.4810 assertions/s.

3 runs, 9 assertions, 0 failures, 0 errors, 0 skips

Credits and References

About LCK#83 formatsyaml
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This page is a web-friendly rendering of my project notes shared in the LittleCodingKata GitHub repository.

LittleCodingKata is my collection of programming exercises, research and code toys broadly spanning things that relate to programming and software development (languages, frameworks and tools).

These range from the trivial to the complex and serious. Many are inspired by existing work and I'll note credits and references where applicable. The focus is quite scattered, as I variously work on things new and important in the moment, or go back to revisit things from the past.

This is primarily a personal collection for my own edification and learning, but anyone who stumbles by is welcome to borrow, steal or reference the work here. And if you spot errors or issues I'd really appreciate some feedback - create an issue, send me an email or even send a pull-request.