YAML is a recursive acronym meaning "YAML Ain't Markup Language", and is intended as a "human friendly data serialization standard for all programming languages." It is often used for application configuration.
Zend_Config_Yaml is a lightweight
Zend_Config extension. It includes a parser capable of
recognizing most common YAML syntax used for purposes of configuration, and allows
specifying other parsers should you want more complex syntax (e.g., ext/syck, spyc,
sfYaml, etc.).