Added documentation on the ErrorHandler interface.
This closes bug #126034.
diff --git a/Doc/lib/xmlsaxhandler.tex b/Doc/lib/xmlsaxhandler.tex
index 6796286..8d9c519 100644
--- a/Doc/lib/xmlsaxhandler.tex
+++ b/Doc/lib/xmlsaxhandler.tex
@@ -37,6 +37,13 @@
external entities.
\end{classdesc}
+\begin{classdesc}{ErrorHandler}{}
+ Interface used by the parser to present error and warning messages
+ to the application. The methods of this object control whether errors
+ are immediately converted to exceptions or are handled in some other
+ way.
+\end{classdesc}
+
In addition to these classes, \module{xml.sax.handler} provides
symbolic constants for the feature and property names.
@@ -327,3 +334,36 @@
system identifier to read from as a string, or an InputSource to
read from. The default implementation returns \var{systemId}.
\end{methoddesc}
+
+
+\subsection{ErrorHandler Objects \label{sax-error-handler}}
+
+Objects with this interface are used to receive error and warning
+information from the \class{XMLReader}. If you create an object that
+implements this interface, then register the object with your
+\class{XMLReader}, the parser will call the methods in your object to
+report all warnings and errors. There are three levels of errors
+available: warnings, (possibly) recoverable errors, and unrecoverable
+errors. All methods take a \exception{SAXParseException} as the only
+parameter. Errors and warnings may be converted to an exception by
+raising the passed-in exception object.
+
+\begin{methoddesc}[ErrorHandler]{error}{exception}
+ Called when the parser encounters a recoverable error. If this method
+ does not raise an exception, parsing may continue, but further document
+ information should not be expected by the application. Allowing the
+ parser to continue may allow additional errors to be discovered in the
+ input document.
+\end{methoddesc}
+
+\begin{methoddesc}[ErrorHandler]{fatalError}{exception}
+ Called when the parser encounters an error it cannot recover from;
+ parsing is expected to terminate when this method returns.
+\end{methoddesc}
+
+\begin{methoddesc}[ErrorHandler]{warning}{exception}
+ Called when the parser presents minor warning information to the
+ application. Parsing is expected to continue when this method returns,
+ and document information will continue to be passed to the application.
+ Raising an exception in this method will cause parsing to end.
+\end{methoddesc}