define([
  	"./core",
  	"./var/deletedIds",
  	"./data/support",
  	"./data/accepts"
  ], function( jQuery, deletedIds, support ) {
  
  var rbrace = /^(?:\{[\w\W]*\}|\[[\w\W]*\])$/,
  	rmultiDash = /([A-Z])/g;
  
  function dataAttr( elem, key, data ) {
  	// If nothing was found internally, try to fetch any
  	// data from the HTML5 data-* attribute
  	if ( data === undefined && elem.nodeType === 1 ) {
  
  		var name = "data-" + key.replace( rmultiDash, "-$1" ).toLowerCase();
  
  		data = elem.getAttribute( name );
  
  		if ( typeof data === "string" ) {
  			try {
  				data = data === "true" ? true :
  					data === "false" ? false :
  					data === "null" ? null :
  					// Only convert to a number if it doesn't change the string
  					+data + "" === data ? +data :
  					rbrace.test( data ) ? jQuery.parseJSON( data ) :
  					data;
  			} catch( e ) {}
  
  			// Make sure we set the data so it isn't changed later
  			jQuery.data( elem, key, data );
  
  		} else {
  			data = undefined;
  		}
  	}
  
  	return data;
  }
  
  // checks a cache object for emptiness
  function isEmptyDataObject( obj ) {
  	var name;
  	for ( name in obj ) {
  
  		// if the public data object is empty, the private is still empty
  		if ( name === "data" && jQuery.isEmptyObject( obj[name] ) ) {
  			continue;
  		}
  		if ( name !== "toJSON" ) {
  			return false;
  		}
  	}
  
  	return true;
  }
  
  function internalData( elem, name, data, pvt /* Internal Use Only */ ) {
  	if ( !jQuery.acceptData( elem ) ) {
  		return;
  	}
  
  	var ret, thisCache,
  		internalKey = jQuery.expando,
  
  		// We have to handle DOM nodes and JS objects differently because IE6-7
  		// can't GC object references properly across the DOM-JS boundary
  		isNode = elem.nodeType,
  
  		// Only DOM nodes need the global jQuery cache; JS object data is
  		// attached directly to the object so GC can occur automatically
  		cache = isNode ? jQuery.cache : elem,
  
  		// Only defining an ID for JS objects if its cache already exists allows
  		// the code to shortcut on the same path as a DOM node with no cache
  		id = isNode ? elem[ internalKey ] : elem[ internalKey ] && internalKey;
  
  	// Avoid doing any more work than we need to when trying to get data on an
  	// object that has no data at all
  	if ( (!id || !cache[id] || (!pvt && !cache[id].data)) && data === undefined && typeof name === "string" ) {
  		return;
  	}
  
  	if ( !id ) {
  		// Only DOM nodes need a new unique ID for each element since their data
  		// ends up in the global cache
  		if ( isNode ) {
  			id = elem[ internalKey ] = deletedIds.pop() || jQuery.guid++;
  		} else {
  			id = internalKey;
  		}
  	}
  
  	if ( !cache[ id ] ) {
  		// Avoid exposing jQuery metadata on plain JS objects when the object
  		// is serialized using JSON.stringify
  		cache[ id ] = isNode ? {} : { toJSON: jQuery.noop };
  	}
  
  	// An object can be passed to jQuery.data instead of a key/value pair; this gets
  	// shallow copied over onto the existing cache
  	if ( typeof name === "object" || typeof name === "function" ) {
  		if ( pvt ) {
  			cache[ id ] = jQuery.extend( cache[ id ], name );
  		} else {
  			cache[ id ].data = jQuery.extend( cache[ id ].data, name );
  		}
  	}
  
  	thisCache = cache[ id ];
  
  	// jQuery data() is stored in a separate object inside the object's internal data
  	// cache in order to avoid key collisions between internal data and user-defined
  	// data.
  	if ( !pvt ) {
  		if ( !thisCache.data ) {
  			thisCache.data = {};
  		}
  
  		thisCache = thisCache.data;
  	}
  
  	if ( data !== undefined ) {
  		thisCache[ jQuery.camelCase( name ) ] = data;
  	}
  
  	// Check for both converted-to-camel and non-converted data property names
  	// If a data property was specified
  	if ( typeof name === "string" ) {
  
  		// First Try to find as-is property data
  		ret = thisCache[ name ];
  
  		// Test for null|undefined property data
  		if ( ret == null ) {
  
  			// Try to find the camelCased property
  			ret = thisCache[ jQuery.camelCase( name ) ];
  		}
  	} else {
  		ret = thisCache;
  	}
  
  	return ret;
  }
  
  function internalRemoveData( elem, name, pvt ) {
  	if ( !jQuery.acceptData( elem ) ) {
  		return;
  	}
  
  	var thisCache, i,
  		isNode = elem.nodeType,
  
  		// See jQuery.data for more information
  		cache = isNode ? jQuery.cache : elem,
  		id = isNode ? elem[ jQuery.expando ] : jQuery.expando;
  
  	// If there is already no cache entry for this object, there is no
  	// purpose in continuing
  	if ( !cache[ id ] ) {
  		return;
  	}
  
  	if ( name ) {
  
  		thisCache = pvt ? cache[ id ] : cache[ id ].data;
  
  		if ( thisCache ) {
  
  			// Support array or space separated string names for data keys
  			if ( !jQuery.isArray( name ) ) {
  
  				// try the string as a key before any manipulation
  				if ( name in thisCache ) {
  					name = [ name ];
  				} else {
  
  					// split the camel cased version by spaces unless a key with the spaces exists
  					name = jQuery.camelCase( name );
  					if ( name in thisCache ) {
  						name = [ name ];
  					} else {
  						name = name.split(" ");
  					}
  				}
  			} else {
  				// If "name" is an array of keys...
  				// When data is initially created, via ("key", "val") signature,
  				// keys will be converted to camelCase.
  				// Since there is no way to tell _how_ a key was added, remove
  				// both plain key and camelCase key. #12786
  				// This will only penalize the array argument path.
  				name = name.concat( jQuery.map( name, jQuery.camelCase ) );
  			}
  
  			i = name.length;
  			while ( i-- ) {
  				delete thisCache[ name[i] ];
  			}
  
  			// If there is no data left in the cache, we want to continue
  			// and let the cache object itself get destroyed
  			if ( pvt ? !isEmptyDataObject(thisCache) : !jQuery.isEmptyObject(thisCache) ) {
  				return;
  			}
  		}
  	}
  
  	// See jQuery.data for more information
  	if ( !pvt ) {
  		delete cache[ id ].data;
  
  		// Don't destroy the parent cache unless the internal data object
  		// had been the only thing left in it
  		if ( !isEmptyDataObject( cache[ id ] ) ) {
  			return;
  		}
  	}
  
  	// Destroy the cache
  	if ( isNode ) {
  		jQuery.cleanData( [ elem ], true );
  
  	// Use delete when supported for expandos or `cache` is not a window per isWindow (#10080)
  	/* jshint eqeqeq: false */
  	} else if ( support.deleteExpando || cache != cache.window ) {
  		/* jshint eqeqeq: true */
  		delete cache[ id ];
  
  	// When all else fails, null
  	} else {
  		cache[ id ] = null;
  	}
  }
  
  jQuery.extend({
  	cache: {},
  
  	// The following elements (space-suffixed to avoid Object.prototype collisions)
  	// throw uncatchable exceptions if you attempt to set expando properties
  	noData: {
  		"applet ": true,
  		"embed ": true,
  		// ...but Flash objects (which have this classid) *can* handle expandos
  		"object ": "clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
  	},
  
  	hasData: function( elem ) {
  		elem = elem.nodeType ? jQuery.cache[ elem[jQuery.expando] ] : elem[ jQuery.expando ];
  		return !!elem && !isEmptyDataObject( elem );
  	},
  
  	data: function( elem, name, data ) {
  		return internalData( elem, name, data );
  	},
  
  	removeData: function( elem, name ) {
  		return internalRemoveData( elem, name );
  	},
  
  	// For internal use only.
  	_data: function( elem, name, data ) {
  		return internalData( elem, name, data, true );
  	},
  
  	_removeData: function( elem, name ) {
  		return internalRemoveData( elem, name, true );
  	}
  });
  
  jQuery.fn.extend({
  	data: function( key, value ) {
  		var i, name, data,
  			elem = this[0],
  			attrs = elem && elem.attributes;
  
  		// Special expections of .data basically thwart jQuery.access,
  		// so implement the relevant behavior ourselves
  
  		// Gets all values
  		if ( key === undefined ) {
  			if ( this.length ) {
  				data = jQuery.data( elem );
  
  				if ( elem.nodeType === 1 && !jQuery._data( elem, "parsedAttrs" ) ) {
  					i = attrs.length;
  					while ( i-- ) {
  
  						// Support: IE11+
  						// The attrs elements can be null (#14894)
  						if ( attrs[ i ] ) {
  							name = attrs[ i ].name;
  							if ( name.indexOf( "data-" ) === 0 ) {
  								name = jQuery.camelCase( name.slice(5) );
  								dataAttr( elem, name, data[ name ] );
  							}
  						}
  					}
  					jQuery._data( elem, "parsedAttrs", true );
  				}
  			}
  
  			return data;
  		}
  
  		// Sets multiple values
  		if ( typeof key === "object" ) {
  			return this.each(function() {
  				jQuery.data( this, key );
  			});
  		}
  
  		return arguments.length > 1 ?
  
  			// Sets one value
  			this.each(function() {
  				jQuery.data( this, key, value );
  			}) :
  
  			// Gets one value
  			// Try to fetch any internally stored data first
  			elem ? dataAttr( elem, key, jQuery.data( elem, key ) ) : undefined;
  	},
  
  	removeData: function( key ) {
  		return this.each(function() {
  			jQuery.removeData( this, key );
  		});
  	}
  });
  
  return jQuery;
  });