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+/*
+ [The "BSD licence"]
+ Copyright (c) 2013 Terence Parr
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/** XML parser derived from ANTLR v4 ref guide book example */
+parser grammar XMLParser;
+
+options { tokenVocab=XMLLexer; }
+
+document    :   prolog? misc* element misc*;
+
+prolog      :   XMLDeclOpen attribute* SPECIAL_CLOSE ;
+
+content     :   chardata?
+                ((element | reference | CDATA | PI | COMMENT) chardata?)* ;
+
+element     :   '<' elmName=Name attribute* '>' content '<' '/' Name '>'
+            |   '<' elmName=Name attribute* '/>'
+            ;
+
+reference   :   EntityRef | CharRef ;
+
+attribute   :   attrName=Name '=' attrValue=STRING ; // Our STRING is AttValue in spec
+
+/** ``All text that is not markup constitutes the character data of
+ *  the document.''
+ */
+chardata    :   TEXT | SEA_WS ;
+
+misc        :   COMMENT | PI | SEA_WS ;