## 13.5.1 Module Contents

The `xml.dom` contains the following functions:

`registerDOMImplementation`(name, factory)
  Register the factory function with the name name. The factory function should return an object which implements the `DOMImplementation` interface. The factory function can return the same object every time, or a new one for each call, as appropriate for the specific implementation (e.g. if that implementation supports some customization).

`getDOMImplementation`(name = None, features = ())
  Return a suitable DOM implementation. The name is either well-known, the module name of a DOM implementation, or `None`. If it is not `None`, imports the corresponding module and returns a `DOMImplementation` object if the import succeeds. If no name is given, and if the environment variable PYTHON_DOM is set, this variable is used to find the implementation.

  If name is not given, consider the available implementations to find one with the required feature set. If no implementation can be found, raise an `ImportError`. The features list must be a sequence of (feature, version) pairs which are passed to hasFeature.

In addition, `xml.dom` contains the `Node`, and the DOM exceptions.