004 — Namespaces

Package namespace rules are the following:

1. PascalCase is used for namespace parts.
2. Root vendor namespace is Yiisoft.
3. Package name parts are used in namespace.
4. Adjective is added to a noun and is a single part.

Some examples:

Package	Namespace
yiisoft/yii-web	Yiisoft\Yii\Web
yiisoft/di	Yiisoft\Di
yiisoft/db-mysql	Yiisoft\Db\Mysql
yiisoft/friendly-exception	Yiisoft\FriendlyException

Referencias

• International forum discussion