# Package ch.qos.logback.core.property

Class Summary
Class | Description
--- | ---
FileExistsPropertyDefiner | In conjunction with `PropertyAction` sets the named variable to "true" if the file specified by `path` property exists, to "false" otherwise.
ResourceExistsPropertyDefiner | In conjunction with `PropertyAction` sets the named variable to "true" if the `resource` specified by the user is available on the class path, "false" otherwise.