Doctrine 2 annotations and "var"

Could someone tell me whats the meaning of "@var" in annotations configuration?

For example:

/**
 * @Col开发者_开发技巧umn(type="string", length=20, unique=TRUE)
 * @var string
 */
protected $login;

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It tells you what type of variable is it. Whether it's integer, string or an object, for example. It's used for auto-documentating processes

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This is an annotation used for automatic documentation generation with phpDocumentor. For @var see their documentation.