diff --git a/src/encoding/BinaryXMLCodec.js b/src/encoding/BinaryXMLCodec.js
new file mode 100644
index 0000000..077c7e2
--- /dev/null
+++ b/src/encoding/BinaryXMLCodec.js
@@ -0,0 +1,135 @@
+
+var XML_EXT = 0x00; 
+	
+var XML_TAG = 0x01; 
+	
+var XML_DTAG = 0x02; 
+	
+var XML_ATTR = 0x03; 
+ 
+var XML_DATTR = 0x04; 
+	
+var XML_BLOB = 0x05; 
+	
+var XML_UDATA = 0x06; 
+	
+var XML_CLOSE = 0x0;
+
+var XML_SUBTYPE_PROCESSING_INSTRUCTIONS = 16; 
+	
+
+var XML_TT_BITS = 3;
+var XML_TT_MASK = ((1 << XML_TT_BITS) - 1);
+var XML_TT_VAL_BITS = XML_TT_BITS + 1;
+var XML_TT_VAL_MASK = ((1 << (XML_TT_VAL_BITS)) - 1);
+var XML_REG_VAL_BITS = 7;
+var XML_REG_VAL_MASK = ((1 << XML_REG_VAL_BITS) - 1);
+var XML_TT_NO_MORE = (1 << XML_REG_VAL_BITS); // 0x80
+var BYTE_MASK = 0xFF;
+var LONG_BYTES = 8;
+var LONG_BITS = 64;
+	
+var bits_11 = 0x0000007FFL;
+var bits_18 = 0x00003FFFFL;
+var bits_32 = 0x0FFFFFFFFL;
+
+
+var TypeAndVal = function TypeAndVal(_type,_val) {
+	this.type = _type;
+	this.val = _val;
+	
+};
+exports.TypeAndVal = TypeAndVal;
+
+var BinaryXMLCodec = function BinaryXMLCodec(){
+	
+	this.CODEC_NAME = "Binary";
+			
+
+
+};
+
+exports.BinaryXMLCodec = BinaryXMLCodec;
+
+
+    
+BinaryXMLCodec.prototype.encodeTypeAndVal = function(
+	//int
+	type,
+	//long
+	val,
+	//byte []
+	buf,
+	//int
+	offset) {
+	
+	if ((type > XML_UDATA) || (type < 0) || (val < 0)) {
+		throw new Exception("Tag and value must be positive, and tag valid.");
+	}
+	
+	// Encode backwards. Calculate how many bytes we need:
+	int numEncodingBytes = numEncodingBytes(val);
+	
+	if ((offset + numEncodingBytes) > buf.length) {
+		throw new Exception("Buffer space of " + (buf.length-offset) + 
+											" bytes insufficient to hold " + 
+											numEncodingBytes + " of encoded type and value.");
+	}
+	
+
+	buf[offset + numEncodingBytes - 1] = 
+		(BYTE_MASK &
+					(((XML_TT_MASK & type) | 
+					 ((XML_TT_VAL_MASK & val) << XML_TT_BITS))) |
+					 XML_TT_NO_MORE); 
+	val = val >>> XML_TT_VAL_BITS;;
+
+	int i = offset + numEncodingBytes - 2;
+	while ((0 != val) && (i >= offset)) {
+		buf[i] = (BYTE_MASK &
+						    (val & XML_REG_VAL_MASK)); 
+		val = val >>> XML_REG_VAL_BITS;
+		--i;
+	}
+	
+	return numEncodingBytes;
+};
+	
+BinaryXMLCodec.prototype.decodeTypeAndVal = function(
+		/*InputStream*/
+		istream) {
+	
+	int next;
+	int type = -1;
+	long val = 0;
+	boolean more = true;
+
+	do {
+		next = istream.read();
+		
+		if (next < 0) {
+			return null; 
+		}
+
+		if ((0 == next) && (0 == val)) {
+			return null;
+		}
+		
+		more = (0 == (next & XML_TT_NO_MORE));
+		
+		if  (more) {
+			val = val << XML_REG_VAL_BITS;
+			val |= (next & XML_REG_VAL_MASK);
+		} else {
+
+			type = next & XML_TT_MASK;
+			val = val << XML_TT_VAL_BITS;
+			val |= ((next >>> XML_TT_BITS) & XML_TT_VAL_MASK);
+		}
+		
+	} while (more);
+	
+	return new TypeAndVal(type, val);
+};
+
+//TODO
\ No newline at end of file
diff --git a/src/encoding/BinaryXMLDecoder.js b/src/encoding/BinaryXMLDecoder.js
new file mode 100644
index 0000000..4a8b1c4
--- /dev/null
+++ b/src/encoding/BinaryXMLDecoder.js
@@ -0,0 +1,89 @@
+var MARK_LEN=512;
+var DEBUG_MAX_LEN =  32768;
+
+var BinaryXMLDecoder = new BinaryXMLDecoder(_Istream){
+	this.Istream = _Istream;
+	
+};
+
+
+BinaryXMLDecoder.prototype.readStartElement =function(
+	//String
+	startTag,				    
+	//TreeMap<String, String>
+	attributes) {
+
+	try {
+		BinaryXMLCodec.TypeAndVal tv = BinaryXMLCodec.decodeTypeAndVal(this.Istream);
+		
+		if (null == tv) {
+			throw new Exception("Expected start element: " + startTag + " got something not a tag.");
+		}
+		
+		String decodedTag = null;
+		
+		if (tv.type() == BinaryXMLCodec.XML_TAG) {
+			
+			decodedTag = BinaryXMLCodec.decodeUString(this.Istream, tv.val()+1);
+			
+		} else if (tv.type() == BinaryXMLCodec.XML_DTAG) {
+			decodedTag = tagToString(tv.val());	
+		}
+		
+		if ((null ==  decodedTag) || (!decodedTag.equals(startTag))) {
+			throw new Exception("Expected start element: " + startTag + " got: " + decodedTag + "(" + tv.val() + ")");
+		}
+		
+		if (null != attributes) {
+			readAttributes(attributes); 
+		}
+		
+	} catch (e) {
+		throw new Exception("readStartElement", e);
+	}
+};
+
+BinaryXMLDecoder.prototype.readAttributes = function(
+	//TreeMap<String,String> 
+	attributes){
+	
+	if (null == attributes) {
+		return;
+	}
+
+	try {
+
+		BinaryXMLCodec.TypeAndVal nextTV = BinaryXMLCodec.peekTypeAndVal(_istream);
+
+		while ((null != nextTV) && ((BinaryXMLCodec.XML_ATTR == nextTV.type()) ||
+				(BinaryXMLCodec.XML_DATTR == nextTV.type()))) {
+
+			BinaryXMLCodec.TypeAndVal thisTV = BinaryXMLCodec.decodeTypeAndVal(this.Istream);
+
+			var attributeName = null;
+			if (BinaryXMLCodec.XML_ATTR == thisTV.type()) {
+				
+				attributeName = BinaryXMLCodec.decodeUString(_istream, thisTV.val()+1);
+
+			} else if (BinaryXMLCodec.XML_DATTR == thisTV.type()) {
+				// DKS TODO are attributes same or different dictionary?
+				attributeName = tagToString(thisTV.val());
+				if (null == attributeName) {
+					throw new ContentDecodingException("Unknown DATTR value" + thisTV.val());
+				}
+			}
+			
+			var attributeValue = BinaryXMLCodec.decodeUString(_istream);
+
+			attributes.put(attributeName, attributeValue);
+
+			nextTV = BinaryXMLCodec.peekTypeAndVal(_istream);
+		}
+
+	} catch ( e) {
+
+		throw new ContentDecodingException("readStartElement", e);
+	}
+};
+
+//TODO
\ No newline at end of file
diff --git a/src/encoding/BinaryXMLEncoder.js b/src/encoding/BinaryXMLEncoder.js
new file mode 100644
index 0000000..7ccf3b4
--- /dev/null
+++ b/src/encoding/BinaryXMLEncoder.js
@@ -0,0 +1,31 @@
+
+var BinaryXMLEncoder = function BinaryXMLEncoder(){
+	
+BinaryXMLEncoder.prototype.writeStartElement = function(
+		//String 
+		tag, 
+		//TreeMap<String,String> 
+		attributes){
+	
+}
+	try {
+		var dictionaryVal = stringToTag(tag);
+		
+		if (null == dictionaryVal) {
+			BinaryXMLCodec.encodeUString(_ostream, tag, BinaryXMLCodec.XML_TAG);
+			
+		} else {
+			BinaryXMLCodec.encodeTypeAndVal(BinaryXMLCodec.XML_DTAG, dictionaryVal, _ostream);
+		}
+		
+		if (null != attributes) {
+			writeAttributes(attributes); 
+		}
+		
+	} catch (e) {
+		throw new Exception(e);
+	}
+};
+
+
+//TODO
\ No newline at end of file
diff --git a/src/encoding/TextXMLCodec.js b/src/encoding/TextXMLCodec.js
new file mode 100644
index 0000000..ea64188
--- /dev/null
+++ b/src/encoding/TextXMLCodec.js
@@ -0,0 +1 @@
+//TODO
\ No newline at end of file
diff --git a/src/encoding/TextXMLDecoder.js b/src/encoding/TextXMLDecoder.js
new file mode 100644
index 0000000..ea64188
--- /dev/null
+++ b/src/encoding/TextXMLDecoder.js
@@ -0,0 +1 @@
+//TODO
\ No newline at end of file
diff --git a/src/encoding/TextXMLEncoder.js b/src/encoding/TextXMLEncoder.js
new file mode 100644
index 0000000..ea64188
--- /dev/null
+++ b/src/encoding/TextXMLEncoder.js
@@ -0,0 +1 @@
+//TODO
\ No newline at end of file