What is used to specify service dependencies in Docker Compose?

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In Docker Compose, the YAML file format is used to specify service dependencies. YAML (YAML Ain't Markup Language) is preferred for its readability and simplicity, making it easier for developers to define and manage their multi-container applications.

In a Docker Compose file, users can define services, networks, and volumes in a structured way, utilizing indentation to represent hierarchical relationships. This structure allows developers to specify how different services depend on each other, enabling features like service orchestration and automatic startup order. For instance, if one service depends on another to be available first, this can be clearly articulated in the YAML configuration.

The other file formats mentioned, such as JSON, XML, and INI, are not the standard or conventional choices for Docker Compose. While they may serve different purposes in various applications, Docker Compose specifically utilizes YAML due to its ease of use and the ability to represent the required data hierarchy in a more human-readable format. This choice enhances collaboration among developers when defining complex service dependencies in containerized applications.

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