function Blob(ruid, blob) {

		function _sliceDetached(start, end, type) {
			var blob, data = blobpool[this.uid];

			if (Basic.typeOf(data) !== 'string' || !data.length) {
				return null; // or throw exception
			}

			blob = new Blob(null, {
				type: type,
				size: end - start
			});
			blob.detach(data.substr(start, blob.size));

			return blob;
		}

		RuntimeClient.call(this);

		if (ruid) {	
			this.connectRuntime(ruid);
		}

		if (!blob) {
			blob = {};
		} else if (Basic.typeOf(blob) === 'string') { // dataUrl or binary string
			blob = { data: blob };
		}

		Basic.extend(this, {
			
			/**
			Unique id of the component

			@property uid
			@type {String}
			*/
			uid: blob.uid || Basic.guid('uid_'),
			
			/**
			Unique id of the connected runtime, if falsy, then runtime will have to be initialized 
			before this Blob can be used, modified or sent

			@property ruid
			@type {String}
			*/
			ruid: ruid,
	
			/**
			Size of blob

			@property size
			@type {Number}
			@default 0
			*/
			size: blob.size || 0,
			
			/**
			Mime type of blob

			@property type
			@type {String}
			@default ''
			*/
			type: blob.type || '',
			
			/**
			@method slice
			@param {Number} [start=0]
			*/
			slice: function(start, end, type) {		
				if (this.isDetached()) {
					return _sliceDetached.apply(this, arguments);
				}
				return this.getRuntime().exec.call(this, 'Blob', 'slice', this.getSource(), start, end, type);
			},

			/**
			Returns "native" blob object (as it is represented in connected runtime) or null if not found

			@method getSource
			@return {Blob} Returns "native" blob object or null if not found
			*/
			getSource: function() {
				if (!blobpool[this.uid]) {
					return null;	
				}
				return blobpool[this.uid];
			},

			/** 
			Detaches blob from any runtime that it depends on and initialize with standalone value

			@method detach
			@protected
			@param {DOMString} [data=''] Standalone value
			*/
			detach: function(data) {
				if (this.ruid) {
					this.getRuntime().exec.call(this, 'Blob', 'destroy');
					this.disconnectRuntime();
					this.ruid = null;
				}

				data = data || '';

				// if dataUrl, convert to binary string
				if (data.substr(0, 5) == 'data:') {
					var base64Offset = data.indexOf(';base64,');
					this.type = data.substring(5, base64Offset);
					data = Encode.atob(data.substring(base64Offset + 8));
				}

				this.size = data.length;

				blobpool[this.uid] = data;
			},

			/**
			Checks if blob is standalone (detached of any runtime)
			
			@method isDetached
			@protected
			@return {Boolean}
			*/
			isDetached: function() {
				return !this.ruid && Basic.typeOf(blobpool[this.uid]) === 'string';
			},
			
			/** 
			Destroy Blob and free any resources it was using

			@method destroy
			*/
			destroy: function() {
				this.detach();
				delete blobpool[this.uid];
			}
		});

		
		if (blob.data) {
			this.detach(blob.data); // auto-detach if payload has been passed
		} else {
			blobpool[this.uid] = blob;	
		}
	}
@class moxie/file/Blob
	@constructor
	@param {String} ruid Unique id of the runtime, to which this blob belongs to
	@param {Object} blob Object "Native" blob object, as it is represented in the runtime