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Standard or regulation

The Open Source Definition

Open Source Initiative, Open Source Initiative, 2024

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Read on October 16, 2026

What it is
The Open Source Initiative's definition of open source software, with its list of criteria a license must meet.
How much weight it carries
The standard definition used by the open-source community. It defines the term; it does not say whether a particular app is safe.

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The Open Source Definition | Yap