# Inheritance

When a destination inherits the `prefetch` property from parent destination with matching names, these behaviors are possible:

- When all parent destinations set the value none, then the child destination inherits the value none.
- When any parent destination sets a non-zero numeric value, then the child destination inherits the largest value from among the entire parent chain.
- When none of the parent destinations sets any non-zero numeric value, then the child destination uses the default value (which is 5).

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