# Commons Configuration 1.3 API

Packages
org.apache.commons.configuration: The Configuration main package.
org.apache.commons.configuration.beanutils: In this package a `Configuration` implementation can be found that implements the `DynaBean` interface.
org.apache.commons.configuration.event: This package contains interfaces and classes for receiving notifications about changes at configurations.
org.apache.commons.configuration.plist: Configuration classes supporting NeXT / OpenStep style configuration.
org.apache.commons.configuration.reloading: The `reloading` package contains the definition of the `ReloadingStrategy` interface, which provides automatic reloading facilities for file based configurations.
org.apache.commons.configuration.tree: A package with helper and utility classes used by hierarchical configurations.
org.apache.commons.configuration.tree.xpath: This package contains the implementation of the XPathExpressionEngine class, which enables XPATH support for querying configuration properties.
org.apache.commons.configuration.web: This package contains some implementations of the `Configuration` interface that are useful in web environments.

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