diff --git a/forms/ecomerce/basket/basket.js b/forms/ecomerce/basket/basket.js
index ff7a5ce5..f8e331f0 100644
--- a/forms/ecomerce/basket/basket.js
+++ b/forms/ecomerce/basket/basket.js
@@ -52,7 +52,7 @@ Hedera.Basket = new Class
 
 	,subtotal: function (form)
 	{
-		return form.get ('amount') * form.get ('price');
+		return form.$.amount * form.$.price;
 	}
 });
 
diff --git a/forms/ecomerce/catalog/catalog.js b/forms/ecomerce/catalog/catalog.js
index 31ead49a..34636feb 100644
--- a/forms/ecomerce/catalog/catalog.js
+++ b/forms/ecomerce/catalog/catalog.js
@@ -18,7 +18,7 @@ Hedera.Catalog = new Class
 	
 		if (!localStorage.getItem ('hederaGuest'))
 		{		
-			Hedera.BasketChecker.check (this.conn, this.hash,
+			Hedera.BasketChecker.check (this.conn, this.params,
 				this.onBasketCheck.bind (this));
 		}
 		else
@@ -37,12 +37,6 @@ Hedera.Catalog = new Class
 	,activate: function ()
 	{
 		this.$('items').setInfo ('a', 'Articles', 'vn2008', ['item_id']);
-		this.$('lot').assign ({filter: this.$('filter')});
-		this.$('lot').setProperties ({
-			type: Vn.LotQuery.Type.EXCLUDE,
-			fields: []
-		});
-	
 		document.body.appendChild (this.$('right-panel'));
 	
 		if (localStorage.getItem ('hederaView'))
@@ -53,14 +47,14 @@ Hedera.Catalog = new Class
 		this.onRealmChange ();
 		this.refreshTitle ();
 	}
-	
+
 	,deactivate: function ()
 	{
 		this.hideMenu ();
 		this.gui.$('top-bar').style.backgroundColor = '';
 		Vn.Node.remove (this.$('right-panel'));
 	}
-	
+
 	,setView: function (view)
 	{
 		if (view === View.GRID)
@@ -116,7 +110,7 @@ Hedera.Catalog = new Class
 	
 	,shouldRefresh: function ()
 	{
-		var params = this.$('lot').params;
+		var params = this.params.$;
 
 		if (params.search)
 			return true;
@@ -151,33 +145,28 @@ Hedera.Catalog = new Class
 	{
 		var link = builder.$('link');
 		link.href = this.hash.make ({
-			form: this.hash.get ('form'),
-			realm: form.get ('id')
+			form: this.hash.$.form,
+			realm: form.$.id
 		});
 		
 		var img = builder.$('image');
-		img.src = 'image/family/light/'+ form.get ('id') +'.svg';
-		img.title = form.get ('name');
+		img.src = 'image/family/light/'+ form.$.id +'.svg';
+		img.title = form.$.name;
 		img.alt = img.title;
 	}
 	
 	,onRealmChange: function ()
 	{
-		var newValue = this.hash.get ('realm');
+		var newValue = this.params.$.realm;
 		this.$('filters').style.display = newValue ? 'block' : 'none';
 		this.$('realm-msg').style.display = newValue ? 'none' : 'block';
-
 		this.refreshTitleColor ();
-		this.hash.params = {
-			form: this.hash.get ('form'),
-			realm: newValue,
-		};
 	}
 
 	,refreshTitleColor: function ()
 	{
 		var realms = this.$('realms');
-		var realm = this.hash.get ('realm');
+		var realm = this.params.$.realm;
 		var color = null;
 
 		if (realm)
@@ -194,7 +183,7 @@ Hedera.Catalog = new Class
 	,refreshTitle: function ()
 	{
 		var types = this.$('types');
-		var type = this.hash.get ('type');		
+		var type = this.params.$.type;		
 		var title = _('Catalog');
 
 		if (type)
@@ -250,7 +239,7 @@ Hedera.Catalog = new Class
 		if (this.isGuest ())
 			return;
 
-		this.hash.params = {form: 'ecomerce/basket'};
+		this.hash.$ = {form: 'ecomerce/basket'};
 	}
 	
 	,onConfigureClick: function ()
@@ -258,7 +247,7 @@ Hedera.Catalog = new Class
 		if (this.isGuest ())
 			return;
 
-		this.hash.params = {form: 'ecomerce/checkout'};
+		this.hash.$ = {form: 'ecomerce/checkout'};
 	}
 
 	,onAddItemClick: function (button, form)
@@ -268,7 +257,7 @@ Hedera.Catalog = new Class
 
 		this.onEraseClick ();
 		this.$('card').row = form.row;
-		this.$('card-lot').assign ({item: form.get ('item_id')});
+		this.$('card-lot').assign ({item: form.$.item_id});
 		this.$('card-popup').show (button.node);
 	}
 	
@@ -317,7 +306,7 @@ Hedera.Catalog = new Class
 		{
 			this.conn.execQuery (sql);
 
-			var itemName = this.$('card').get ('Article');
+			var itemName = this.$('card').$.Article;
 			Htk.Toast.showMessage (
 				sprintf (_('Added%dOf%s'), amountSum, itemName));
 		}
diff --git a/forms/ecomerce/catalog/ui.xml b/forms/ecomerce/catalog/ui.xml
index df4c21ca..c13684eb 100755
--- a/forms/ecomerce/catalog/ui.xml
+++ b/forms/ecomerce/catalog/ui.xml
@@ -8,39 +8,41 @@
 		<vn-spec name="origin" type="Number"/>
 		<vn-spec name="category" type="String"/>
 		<vn-spec name="producer" type="Number"/>
+		<vn-spec name="itemId" type="Number"/>
 	</vn-lot-query>
-	<vn-lot id="card-lot"/>
-	<vn-param lot="params" name="realm" on-changed="onRealmChange"/>
-	<vn-param lot="params" name="type" on-changed="refreshTitle"/>
 	<sql-filter type="AND" id="filter">
 		<sql-filter-item type="EQUAL"
-			field="tipo_id" target="a"
+			target="a" field="tipo_id"
 			param="type"/>
 		<sql-filter type="OR">
 			<sql-filter-item type="LIKE"
-				field="Article" target="a"
+				target="a" field="Article"
 				param="search"/>
 			<sql-filter-item type="EQUAL"
-				field="Id_Article" target="a"
+				target="a" field="Id_Article"
 				param="search"/>
+			<sql-filter-item type="EQUAL"
+				target="a" field="Id_Article"
+				param="itemId"/>
 		</sql-filter>
 		<sql-filter-item type="EQUAL"
-			field="Color" target="a"
+			target="a" field="Color"
 			param="color"/>
 		<sql-filter-item type="EQUAL"
-			field="id_origen" target="a"
+			target="a" field="id_origen"
 			param="origin"/>
 		<sql-filter-item type="EQUAL"
-			field="Categoria" target="a"
+			target="a" field="Categoria"
 			param="category"/>
 		<sql-filter-item type="EQUAL"
-			field="producer_id" target="a"
+			target="a" field="producer_id"
 			param="producer"/>
 	</sql-filter>
 	<db-model
 		id="items"
 		result-index="2"
 		lot="params"
+		filter="filter"
 		auto-load="false">
 		CREATE TEMPORARY TABLE tmp.bionic_calc
 			(INDEX (item_id))
@@ -48,7 +50,7 @@
 			SELECT a.Id_Article item_id
 				FROM vn2008.Articles a
 					JOIN vn2008.Tipos t ON t.tipo_id = a.tipo_id
-				WHERE #filter;
+				WHERE $filter;
 		CALL bionic_calc ();
 		SELECT a.Id_Article item_id, a.description, b.available, b.price,
 				b.producer, a.Foto, a.Article, a.Categoria, a.Medida,
@@ -99,6 +101,9 @@
 				JOIN vn2008.warehouse w ON w.id = p.warehouse_id
 			ORDER BY warehouse_id, grouping;
 	</db-model>
+	<vn-lot id="card-lot"/>
+	<vn-param lot="params" name="realm" on-changed="onRealmChange"/>
+	<vn-param lot="params" name="type" on-changed="refreshTitle"/>
 </vn-group>
 <h1 id="title">
 	<t>Catalog</t>
diff --git a/js/db/model.js b/js/db/model.js
index d78dcdab..21886425 100644
--- a/js/db/model.js
+++ b/js/db/model.js
@@ -101,6 +101,22 @@ Klass.implement
 				return this._lot;
 			}
 		},
+		/**
+		 * The remote filter used for query.
+		 */
+		filter:
+		{
+			type: Sql.Filter
+			,set: function (x)
+			{
+				this._filter = x;
+				this.refresh ();
+			}
+			,get: function ()
+			{
+				return this._filter;
+			}
+		},
 		/**
 		 * The model select statement.
 		 */
@@ -309,7 +325,7 @@ Klass.implement
 			return true;
 
 		for (var key in params)
-		if (params[key] == null)
+		if (params[key] === undefined)
 			return false;
 
 		return true;
@@ -321,7 +337,7 @@ Klass.implement
 	,refresh: function ()
 	{
 		var params = this._getParams ();
-	
+
 		if (this._isReady (params))
 		{
 			this._lastParams = params;
diff --git a/js/hedera/form.js b/js/hedera/form.js
index 589f59bd..c513da48 100644
--- a/js/hedera/form.js
+++ b/js/hedera/form.js
@@ -45,7 +45,10 @@ module.exports = new Class
 		var paramsLot = res.$('params');
 
 		if (paramsLot)
+		{
 			paramsLot.source = this.hash;
+			this.params = paramsLot;
+		}
 
 		var models = res.getByTagName ('db-model');
 
@@ -81,6 +84,7 @@ module.exports = new Class
 			this.gui.setForm (null);
 			this.deactivate ();
 			this.node = null;
+			this.params = null;
 		}
 		if (this.builder)
 		{