Patch #103885: Add dynamic registration and lookup of DOM implementations.

Doc/lib/xmldom.tex

@@ -85,6 +85,36 @@ the strict mapping from IDL).  See section \ref{dom-conformance},
            {This specifies the mapping from OMG IDL to Python.}
 \end{seealso}
 
+\subsection{Module Contents}
+
+The \module{xml.dom} contains the following functions:
+
+\begin{funcdesc}{registerDOMImplementation}{name, factory}
+Register the \var{factory} function with the \var{name}. The factory
+function should return an object which implements the
+\code{DOMImplementation| interface. The factory function can either return
+the same object, or a new one (e.g. if that implementation supports
+some customization).
+\end{funcdesc}
+
+\begin{funcdesc}{getDOMImplementation}{name = None, features = ()}
+Return a suitable DOM implementation. The \var{name} is either
+well-known, the module name of a DOM implementation, or
+\code{None}. If it is not \code{None}, imports the corresponding module and
+returns a \class{DOMImplementation} object if the import succeeds.  If
+no name is given, and if the environment variable \code{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 \exception{ImportError}. The features list must be a sequence of
+(feature, version) pairs which are passed to hasFeature.
+\end{funcdesc}
+
+% Should the Node documentation go here?
+
+In addition, \module{xml.dom} contains the \class{Node}, and the DOM
+exceptions.
 
 \subsection{Objects in the DOM \label{dom-objects}}