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diff --git a/documentation/datamodel/chapter-datamodel.asciidoc b/documentation/datamodel/chapter-datamodel.asciidoc
new file mode 100644
index 0000000000..c28e5b716b
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+++ b/documentation/datamodel/chapter-datamodel.asciidoc
@@ -0,0 +1,20 @@
+[[datamodel]]
+== Binding Components to Data
+
+((("Vaadin Data Model", id="term.datamodel", range="startofrange")))
+
+
+This chapter describes the Vaadin Data Model and shows how you can use it to
+bind components directly to data sources, such as database queries.
+
+
+include::datamodel-overview.asciidoc[leveloffset=+2]
+
+include::datamodel-properties.asciidoc[leveloffset=+2]
+
+include::datamodel-items.asciidoc[leveloffset=+2]
+
+include::datamodel-itembinding.asciidoc[leveloffset=+2]
+
+include::datamodel-container.asciidoc[leveloffset=+2]
+(((range="endofrange", startref="term.datamodel")))
diff --git a/documentation/datamodel/datamodel-container.asciidoc b/documentation/datamodel/datamodel-container.asciidoc
new file mode 100644
index 0000000000..8f88e7c8bf
--- /dev/null
+++ b/documentation/datamodel/datamodel-container.asciidoc
@@ -0,0 +1,834 @@
+---
+title: Collecting Items in Containers
+order: 5
+layout: page
+---
+
+[[datamodel.container]]
+= Collecting Items in Containers
+
+((("[classname]#Container#", id="term.datamodel.container", range="startofrange")))
+
+
+The [classname]#Container# interface is the highest containment level of the
+Vaadin data model, for containing items (rows) which in turn contain properties
+(columns). Containers can therefore represent tabular data, which can be viewed
+in a [classname]#Table# or some other selection component, as well as
+hierarchical data.
+
+The items contained in a container are identified by an __item identifier__ or
+__IID__, and the properties by a __property identifier__ or __PID__.
+
+[[datamodel.container.intro]]
+== Basic Use of Containers
+
+The basic use of containers involves creating one, adding items to it, and
+binding it as a container data source of a component.
+
+[[datamodel.container.intro.default]]
+=== Default Containers and Delegation
+
+Before saying anything about creation of containers, it should be noted that all
+components that can be bound to a container data source are by default bound to
+a default container. For example, [classname]#Table# is bound to a
+[classname]#IndexedContainer#, [classname]#Tree# to a
+[classname]#HierarchicalContainer#, and so forth.
+
+All of the user interface components using containers also implement the
+relevant container interfaces themselves, so that the access to the underlying
+data source is delegated through the component.
+
+
+----
+// Create a table with one column
+Table table = new Table("My Table");
+table.addContainerProperty("col1", String.class, null);
+
+// Access items and properties through the component
+table.addItem("row1"); // Create item by explicit ID
+Item item1 = table.getItem("row1");
+Property property1 = item1.getItemProperty("col1");
+property1.setValue("some given value");
+
+// Equivalent access through the container
+Container container = table.getContainerDataSource();
+container.addItem("row2");
+Item item2 = container.getItem("row2");
+Property property2 = item2.getItemProperty("col1");
+property2.setValue("another given value");
+----
+
+
+[[datamodel.container.intro.creating]]
+=== Creating and Binding a Container
+
+A container is created and bound to a component as follows:
+
+
+----
+// Create a container of some type
+Container container = new IndexedContainer();
+
+// Initialize the container as required by the container type
+container.addContainerProperty("name", String.class, "none");
+container.addContainerProperty("volume", Double.class, 0.0);
+
+... add items ...
+
+// Bind it to a component
+Table table = new Table("My Table");
+table.setContainerDataSource(container);
+----
+
+Most components that can be bound to a container allow passing it also in the
+constructor, in addition to using [methodname]#setContainerDataSource()#.
+Creation of the container depends on its type. For some containers, such as the
+[classname]#IndexedContainer#, you need to define the contained properties
+(columns) as was done above, while some others determine them otherwise. The
+definition of a property with [methodname]#addContainerProperty()# requires a
+unique property ID, type, and a default value. You can also give
+[parameter]#null#.
+
+Vaadin has a several built-in in-memory container implementations, such as
+[classname]#IndexedContainer# and [classname]#BeanItemContainer#, which are easy
+to use for setting up nonpersistent data storages. For persistent data, either
+the built-in [classname]#SQLContainer# or the [classname]#JPAContainer# add-on
+container can be used.
+
+
+[[datamodel.container.intro.adding]]
+=== Adding Items and Accessing Properties
+
+Items can be added to a container with the [methodname]#addItem()# method. The
+parameterless version of the method automatically generates the item ID.
+
+
+----
+// Create an item
+Object itemId = container.addItem();
+----
+
+Properties can be requested from container by first requesting an item with
+[methodname]#getItem()# and then getting the properties from the item with
+[methodname]#getItemProperty()#.
+
+
+----
+// Get the item object
+Item item = container.getItem(itemId);
+
+// Access a property in the item
+Property<String> nameProperty =
+        item.getItemProperty("name");
+
+// Do something with the property
+nameProperty.setValue("box");
+----
+
+You can also get a property directly by the item and property ids with
+[methodname]#getContainerProperty()#.
+
+
+----
+container.getContainerProperty(itemId, "volume").setValue(5.0);
+----
+
+
+[[datamodel.container.intro.givenid]]
+=== Adding Items by Given ID
+
+Some containers, such as [classname]#IndexedContainer# and
+[classname]#HierarchicalContainer#, allow adding items by a given ID, which can
+be any [classname]#Object#.
+
+
+----
+Item item = container.addItem("agivenid");
+item.getItemProperty("name").setValue("barrel");
+Item.getItemProperty("volume").setValue(119.2);
+----
+
+Notice that the actual item __is not__ given as a parameter to the method, only
+its ID, as the interface assumes that the container itself creates all the items
+it contains. Some container implementations can provide methods to add
+externally created items, and they can even assume that the item ID object is
+also the item itself. Lazy containers might not create the item immediately, but
+lazily when it is accessed by its ID.
+
+
+
+[[datamodel.container.inner]]
+== Container Subinterfaces
+
+The [classname]#Container# interface contains inner interfaces that container
+implementations can implement to fulfill different features required by
+components that present container data.
+
+[interfacename]#Container.Filterable#:: Filterable containers allow filtering the contained items by filters, as
+described in <<datamodel.container.filtered>>.
+
+[interfacename]#Container.Hierarchical#:: Hierarchical containers allow representing hierarchical relationships between
+items and are required by the [classname]#Tree# and [classname]#TreeTable#
+components. The [classname]#HierarchicalContainer# is a built-in in-memory
+container for hierarchical data, and is used as the default container for the
+tree components. The [classname]#FilesystemContainer# provides access to
+browsing the content of a file system. Also [classname]#JPAContainer# is
+hierarchical, as described in
+<<dummy/../../../framework/jpacontainer/jpacontainer-usage#jpacontainer.usage.hierarchical,"Hierarchical
+Container">>.
+
+[interfacename]#Container.Indexed#:: An indexed container allows accessing items by an index number, not just their
+item ID. This feature is required by some components, especially
+[classname]#Table#, which needs to provide lazy access to large containers. The
+[classname]#IndexedContainer# is a basic in-memory implementation, as described
+in <<datamodel.container.indexedcontainer>>.
+
+[interfacename]#Container.Ordered#:: An ordered container allows traversing the items in successive order in either
+direction. Most built-in containers are ordered.
+
+[interfacename]#Container.SimpleFilterable#:: This interface enables filtering a container by string matching with
+[methodname]#addContainerFilter()#. The filtering is done by either searching
+the given string anywhere in a property value, or as its prefix.
+
+[interfacename]#Container.Sortable#:: A sortable container is required by some components that allow sorting the
+content, such as [classname]#Table#, where the user can click a column header to
+sort the table by the column. Some other components, such as
+[classname]#Calendar#, may require that the content is sorted to be able to
+display it properly. Depending on the implementation, sorting can be done only
+when the [methodname]#sort()# method is called, or the container is
+automatically kept in order according to the last call of the method.
+
+
+
+See the API documentation for a detailed description of the interfaces.
+
+
+[[datamodel.container.indexedcontainer]]
+== [classname]#IndexedContainer#
+
+The [classname]#IndexedContainer# is an in-memory container that implements the
+[interfacename]#Indexed# interface to allow referencing the items by an index.
+[classname]#IndexedContainer# is used as the default container in most selection
+components in Vaadin.
+
+The properties need to be defined with [methodname]#addContainerProperty()#,
+which takes the property ID, type, and a default value. This must be done before
+any items are added to the container.
+
+
+----
+// Create the container
+IndexedContainer container = new IndexedContainer();
+        
+// Define the properties (columns)
+container.addContainerProperty("name", String.class, "noname");
+container.addContainerProperty("volume", Double.class, -1.0d);
+
+// Add some items
+Object content[][] = { {"jar", 2.0}, {"bottle", 0.75},
+                       {"can", 1.5}};
+for (Object[] row: content) {
+    Item newItem = container.getItem(container.addItem());
+    newItem.getItemProperty("name").setValue(row[0]);
+    newItem.getItemProperty("volume").setValue(row[1]);
+}
+----
+
+New items are added with [methodname]#addItem()#, which returns the item ID of
+the new item, or by giving the item ID as a parameter as was described earlier.
+Note that the [classname]#Table# component, which has
+[classname]#IndexedContainer# as its default container, has a conveniency
+[methodname]#addItem()# method that allows adding items as object vectors
+containing the property values.
+
+The container implements the [interfacename]#Container.Indexed# feature to allow
+accessing the item IDs by their index number, with [methodname]#getIdByIndex()#,
+etc. The feature is required mainly for internal purposes of some components,
+such as [classname]#Table#, which uses it to enable lazy transmission of table
+data to the client-side.
+
+
+[[datamodel.container.beancontainer]]
+== [classname]#BeanContainer#
+
+The [classname]#BeanContainer# is an in-memory container for JavaBean objects.
+Each contained bean is wrapped inside a [classname]#BeanItem# wrapper. The item
+properties are determined automatically by inspecting the getter and setter
+methods of the class. This requires that the bean class has public visibility,
+local classes for example are not allowed. Only beans of the same type can be
+added to the container.
+
+The generic has two parameters: a bean type and an item identifier type. The
+item identifiers can be obtained by defining a custom resolver, using a specific
+item property for the IDs, or by giving item IDs explicitly. As such, it is more
+general than the [classname]#BeanItemContainer#, which uses the bean object
+itself as the item identifier, making the use usually simpler. Managing the item
+IDs makes [classname]#BeanContainer# more complex to use, but it is necessary in
+some cases where the [methodname]#equals()# or [methodname]#hashCode()# methods
+have been reimplemented in the bean.
+
+
+----
+// Here is a JavaBean
+public class Bean implements Serializable {
+    String name;
+    double energy; // Energy content in kJ/100g
+    
+    public Bean(String name, double energy) {
+        this.name   = name;
+        this.energy = energy;
+    }
+    
+    public String getName() {
+        return name;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public double getEnergy() {
+        return energy;
+    }
+    
+    public void setEnergy(double energy) {
+        this.energy = energy;
+    }
+}
+
+void basic(VerticalLayout layout) {
+    // Create a container for such beans with
+    // strings as item IDs.
+    BeanContainer<String, Bean> beans =
+        new BeanContainer<String, Bean>(Bean.class);
+    
+    // Use the name property as the item ID of the bean
+    beans.setBeanIdProperty("name");
+
+    // Add some beans to it
+    beans.addBean(new Bean("Mung bean",   1452.0));
+    beans.addBean(new Bean("Chickpea",    686.0));
+    beans.addBean(new Bean("Lentil",      1477.0));
+    beans.addBean(new Bean("Common bean", 129.0));
+    beans.addBean(new Bean("Soybean",     1866.0));
+
+    // Bind a table to it
+    Table table = new Table("Beans of All Sorts", beans);
+    layout.addComponent(table);
+}
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.beancontainer.basic[on-line example, window="_blank"].
+
+To use explicit item IDs, use the methods [methodname]#addItem(Object, Object)#,
+[methodname]#addItemAfter(Object, Object, Object)#, and
+[methodname]#addItemAt(int, Object, Object)#.
+
+It is not possible to add additional properties to the container, except
+properties in a nested bean.
+
+[[datamodel.container.beancontainer.nestedproperties]]
+=== Nested Properties
+
+((("nested bean properties", id="term.datamodel.container.beancontainer.nestedproperties", range="startofrange")))
+
+
+If you have a nested bean with an 1:1 relationship inside a bean type contained
+in a [classname]#BeanContainer# or [classname]#BeanItemContainer#, you can add
+its properties to the container by specifying them with
+[methodname]#addNestedContainerProperty()#. The feature is defined at the level
+of [classname]#AbstractBeanContainer#.
+((("[methodname]#addNestedContainerProperty()#")))
+
+As with the bean in a bean container, also a nested bean must have public
+visibility or otherwise an access exception is thrown. An intermediate reference
+from a bean in the bean container to a nested bean may have a null value.
+
+For example, let us assume that we have the following two beans with the first
+one nested inside the second one.
+
+
+----
+/** Bean to be nested */
+public class EqCoord implements Serializable {
+    double rightAscension; /* In angle hours */
+    double declination;    /* In degrees     */
+
+    ... setters and getters for the properties ...
+}
+
+/** Bean referencing a nested bean */
+public class Star implements Serializable {
+    String  name;
+    EqCoord equatorial; /* Nested bean */
+
+    ... setters and getters for the properties ...
+}
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.beanitemcontainer.nestedbean[on-line example, window="_blank"].
+
+After creating the container, you can declare the nested properties by
+specifying their property identifiers with the
+[methodname]#addNestedContainerProperty()# in dot notation.
+
+
+----
+// Create a container for beans
+BeanItemContainer<Star> stars =
+    new BeanItemContainer<Star>(Star.class);
+
+// Declare the nested properties to be used in the container
+stars.addNestedContainerProperty("equatorial.rightAscension");
+stars.addNestedContainerProperty("equatorial.declination");
+
+// Add some items
+stars.addBean(new Star("Sirius",  new EqCoord(6.75, 16.71611)));
+stars.addBean(new Star("Polaris", new EqCoord(2.52, 89.26417)));
+
+// Here the nested bean reference is null
+stars.addBean(new Star("Vega", null));
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.beanitemcontainer.nestedbean[on-line example, window="_blank"].
+
+If you bind such a container to a [classname]#Table#, you probably also need to
+set the column headers. Notice that the entire nested bean itself is still a
+property in the container and would be displayed in its own column. The
+[methodname]#toString()# method is used for obtaining the displayed value, which
+is by default an object reference. You normally do not want this, so you can
+hide the column with [methodname]#setVisibleColumns()#.
+((("[methodname]#setVisibleColumns()#")))
+
+
+----
+// Put them in a table
+Table table = new Table("Stars", stars);
+table.setColumnHeader("equatorial.rightAscension", "RA");
+table.setColumnHeader("equatorial.declination",    "Decl");
+table.setPageLength(table.size());
+
+// Have to set explicitly to hide the "equatorial" property
+table.setVisibleColumns("name",
+    "equatorial.rightAscension", "equatorial.declination");
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.beanitemcontainer.nestedbean[on-line example, window="_blank"].
+
+The resulting table is shown in
+<<figure.datamodel.container.beancontainer.nestedproperties>>.
+
+[[figure.datamodel.container.beancontainer.nestedproperties]]
+.[classname]#Table# Bound to a [classname]#BeanContainer# with Nested Properties
+image::img/beanitemcontainer-nested-beans.png[]
+
+The bean binding in [classname]#AbstractBeanContainer# normally uses the
+[classname]#MethodProperty# implementation of the [classname]#Property#
+interface to access the bean properties using the setter and getter methods. For
+nested properties, the [classname]#NestedMethodProperty# implementation is used.
+((("[classname]#MethodProperty#")))
+((("[classname]#NestedMethodProperty#")))
+
+(((range="endofrange", startref="term.datamodel.container.beancontainer.nestedproperties")))
+
+ifdef::web[]
+[[datamodel.container.beancontainer.idresolver]]
+=== Defining a Bean ID Resolver
+
+If a bean ID resolver is set using [methodname]#setBeanIdResolver()# or
+[methodname]#setBeanIdProperty()#, the methods [methodname]#addBean()#,
+[methodname]#addBeanAfter()#, [methodname]#addBeanAt()# and
+[methodname]#addAll()# can be used to add items to the container. If one of
+these methods is called, the resolver is used to generate an identifier for the
+item (must not return [parameter]#null#).
+
+Note that explicit item identifiers can also be used when a resolver has been
+set by calling the [methodname]#addItem*()# methods - the resolver is only used
+when adding beans using the [methodname]#addBean*()# or
+[methodname]#addAll(Collection)# methods.
+
+endif::web[]
+
+
+[[datamodel.container.beanitemcontainer]]
+== [classname]#BeanItemContainer#
+
+[classname]#BeanItemContainer# is a container for JavaBean objects where each
+bean is wrapped inside a [classname]#BeanItem# wrapper. The item properties are
+determined automatically by inspecting the getter and setter methods of the
+class. This requires that the bean class has public visibility, local classes
+for example are not allowed. Only beans of the same type can be added to the
+container.
+
+[classname]#BeanItemContainer# is a specialized version of the
+[classname]#BeanContainer# described in <<datamodel.container.beancontainer>>.
+It uses the bean itself as the item identifier, which makes it a bit easier to
+use than [classname]#BeanContainer# in many cases. The latter is, however,
+needed if the bean has reimplemented the [methodname]#equals()# or
+[methodname]#hashCode()# methods.
+
+Let us revisit the example given in <<datamodel.container.beancontainer>> using
+the [classname]#BeanItemContainer#.
+
+
+----
+// Create a container for the beans
+BeanItemContainer<Bean> beans =
+    new BeanItemContainer<Bean>(Bean.class);
+    
+// Add some beans to it
+beans.addBean(new Bean("Mung bean",   1452.0));
+beans.addBean(new Bean("Chickpea",    686.0));
+beans.addBean(new Bean("Lentil",      1477.0));
+beans.addBean(new Bean("Common bean", 129.0));
+beans.addBean(new Bean("Soybean",     1866.0));
+
+// Bind a table to it
+Table table = new Table("Beans of All Sorts", beans);
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.beanitemcontainer.basic[on-line example, window="_blank"].
+
+It is not possible to add additional properties to a
+[classname]#BeanItemContainer#, except properties in a nested bean, as described
+in <<datamodel.container.beancontainer>>. ((("nested bean
+properties")))
+
+
+ifdef::web[]
+[[datamodel.container.iterating]]
+== Iterating Over a Container
+
+As the items in a [classname]#Container# are not necessarily indexed, iterating
+over the items has to be done using an [classname]#Iterator#. The
+[methodname]#getItemIds()# method of [classname]#Container# returns a
+[classname]#Collection# of item identifiers over which you can iterate. The
+following example demonstrates a typical case where you iterate over the values
+of check boxes in a column of a [classname]#Table# component. The context of the
+example is the example used in
+<<dummy/../../../framework/components/components-table#components.table,"Table">>.
+
+
+----
+// Collect the results of the iteration into this string.
+String items = "";
+
+// Iterate over the item identifiers of the table.
+for (Iterator i = table.getItemIds().iterator(); i.hasNext();) {
+    // Get the current item identifier, which is an integer.
+    int iid = (Integer) i.next();
+    
+    // Now get the actual item from the table.
+    Item item = table.getItem(iid);
+    
+    // And now we can get to the actual checkbox object.
+    Button button = (Button)
+            (item.getItemProperty("ismember").getValue());
+    
+    // If the checkbox is selected.
+    if ((Boolean)button.getValue() == true) {
+        // Do something with the selected item; collect the
+        // first names in a string.
+        items += item.getItemProperty("First Name")
+                     .getValue() + " ";
+    }
+}
+
+// Do something with the results; display the selected items.
+layout.addComponent (new Label("Selected items: " + items));
+----
+
+Notice that the [methodname]#getItemIds()# returns an __unmodifiable
+collection__, so the [classname]#Container# may not be modified during
+iteration. You can not, for example, remove items from the
+[classname]#Container# during iteration. The modification includes modification
+in another thread. If the [classname]#Container# is modified during iteration, a
+[classname]#ConcurrentModificationException# is thrown and the iterator may be
+left in an undefined state.
+
+endif::web[]
+
+[[datamodel.container.gpc]]
+== [classname]#GeneratedPropertyContainer#
+
+[classname]#GeneratedPropertyContainer# is a container wrapper that allows
+defining generated values for properties (columns). The generated properties can
+shadow properties with the same IDs in the wrapped container. Removing a
+property from the wrapper hides it.
+
+The container is especially useful with [classname]#Grid#, which does not
+support generated columns or hiding columns like [classname]#Table# does.
+
+[[datamodel.container.gpc.wrapping]]
+=== Wrapping a Container
+
+A container to be wrapped must be a [interfacename]#Container.Indexed#. It can
+optionally also implement [interfacename]#Container.Sortable# or
+[interfacename]#Container.Filterable# to enable sorting and filtering the
+container, respectively.
+
+For example, let us consider the following container with some regular columns:
+
+
+----
+IndexedContainer container = new IndexedContainer();
+container.addContainerProperty("firstname", String.class, null);
+container.addContainerProperty("lastname", String.class, null);
+container.addContainerProperty("born", Integer.class, null);
+container.addContainerProperty("died", Integer.class, null);
+
+// Wrap it
+GeneratedPropertyContainer gpcontainer =
+    new GeneratedPropertyContainer(container);
+----
+
+
+[[datamodel.container.gpc.properties]]
+=== Generated Properties
+
+Now, you can add generated properties in the container with
+[methodname]#addGeneratedProperty()# by specifying a property ID and a
+[interfacename]#PropertyValueGenerator#. The method takes the ID of the
+generated property as first parameter; you can use a same ID as in the wrapped
+container to shadow its properties.
+
+You need to implement [methodname]#getType()#, which must return the class
+object of the value type of the property, and [methodname]#getValue()#, which
+returns the property value for the given item. The item ID and the property ID
+of the generated property are also given in case they are needed. You can access
+other properties of the item to compute the property value.
+
+
+----
+gpcontainer.addGeneratedProperty("lived",
+    new PropertyValueGenerator<Integer>() {
+    @Override
+    public Integer getValue(Item item, Object itemId,
+                            Object propertyId) {
+        int born = (Integer)
+                   item.getItemProperty("born").getValue();
+        int died = (Integer)
+                   item.getItemProperty("died").getValue();
+        return Integer.valueOf(died - born);
+    }
+
+    @Override
+    public Class<Integer> getType() {
+        return Integer.class;
+    }
+});
+----
+
+You can access other items in the container, also their generated properties,
+although you should beware of accidental recursion.
+
+
+[[datamodel.container.gpc.using]]
+=== Using [classname]#GeneratedPropertyContainer#
+
+Finally, you need to bind the [classname]#GeneratedPropertyContainer# to the
+component instead of the wrapped container.
+
+
+----
+Grid grid = new Grid(gpcontainer);
+----
+
+When using [classname]#GeneratedPropertyContainer# in [classname]#Grid#, notice
+that generated columns are read-only, so you can not add grid rows with
+[methodname]#addRow()#. In editable mode, editor fields are not generated for
+generated columns.
+
+
+[[datamodel.container.gpc.sorting]]
+=== Sorting
+
+Even though the [classname]#GeneratedPropertyContainer# implements
+[interfacename]#Container.Sortable#, the wrapped container must also support it
+or otherwise sorting is disabled. Also, the generated properties are not
+normally sortable, but require special handling to enable sorting.
+
+
+
+[[datamodel.container.filtered]]
+== [classname]#Filterable# Containers
+
+((("Container", "Filterable", id="term.datamodel.container.filtered.filterable", range="startofrange")))
+
+
+((("[classname]#Filter# (in [classname]#Container#)", id="term.datamodel.container.filtered.filters", range="startofrange")))
+
+
+Containers that implement the [classname]#Container.Filterable# interface can be
+filtered. For example, the built-in [classname]#IndexedContainer# and the bean
+item containers implement it. Filtering is typically used for filtering the
+content of a [classname]#Table#.
+((("[classname]#IndexedContainer#")))
+((("[classname]#Table#")))
+
+Filters implement the [classname]#Filter# interface and you add them to a
+filterable container with the [methodname]#addContainerFilter()# method.
+Container items that pass the filter condition are kept and shown in the
+filterable component.
+((("[methodname]#addContainerFilter()#")))
+
+
+----
+Filter filter = new SimpleStringFilter("name",
+        "Douglas", true, false);
+table.addContainerFilter(filter);
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.filter.basic[on-line example, window="_blank"].
+
+If multiple filters are added to a container, they are evaluated using the
+logical AND operator so that only items that are passed by all the filters are
+kept.
+
+[[datamodel.container.filtered.composite]]
+=== Atomic and Composite Filters
+
+Filters can be classified as __atomic__ and __composite__. Atomic filters, such
+as [classname]#SimpleStringFilter#, define a single condition, usually for a
+specific container property. Composite filters make filtering decisions based on
+the result of one or more other filters. The built-in composite filters
+implement the logical operators AND, OR, or NOT.
+
+For example, the following composite filter would filter out items where the
+[literal]#++name++# property contains the name "Douglas" somewhere __or__ where
+the [literal]#++age++# property has value less than 42. The properties must have
+[classname]#String# and [classname]#Integer# types, respectively.
+
+
+----
+
+filter = new Or(new SimpleStringFilter("name",
+        "Douglas", true, false),
+        new Compare.Less("age", 42));
+----
+
+
+[[datamodel.container.filtered.builtin]]
+=== Built-In Filter Types
+
+The built-in filter types are the following:
+
+[classname]#SimpleStringFilter#:: ((("[classname]#SimpleStringFilter#")))
++
+Passes items where the specified property, that must be of [classname]#String#
+type, contains the given [parameter]#filterString# as a substring. If
+[parameter]#ignoreCase# is [parameter]#true#, the search is case insensitive. If
+the [parameter]#onlyMatchPrefix# is [parameter]#true#, the substring may only be
+in the beginning of the string, otherwise it may be elsewhere as well.
+
+[classname]#IsNull#:: ((("[classname]#IsNull# (filter)")))
++
+Passes items where the specified property has null value. For in-memory
+filtering, a simple [literal]#++==++# check is performed. For other containers,
+the comparison implementation is container dependent, but should correspond to
+the in-memory null check.
+
+[classname]#Equal#,[classname]#Greater#,
+ [classname]#Less#,
+ [classname]#GreaterOrEqual#, and[classname]#LessOrEqual#:: ((("[classname]#Equal# (filter)")))
+((("[classname]#Greater# (filter)")))
+((("[classname]#Less# (filter)")))
+((("[classname]#GreaterOrEqual# (filter)")))
+((("[classname]#LessOrEqual# (filter)")))
++
+The comparison filter implementations compare the specified property value to
+the given constant and pass items for which the comparison result is true. The
+comparison operators are included in the abstract [classname]#Compare# class.
+
++
+For the [classname]#Equal# filter, the [methodname]#equals()# method for the
+property is used in built-in in-memory containers. In other types of containers,
+the comparison is container dependent and may use, for example, database
+comparison operations.
+
++
+For the other filters, the property value type must implement the
+[classname]#Comparable# interface to work with the built-in in-memory
+containers. Again for the other types of containers, the comparison is container
+dependent.
+
+[classname]#And#and[classname]#Or#:: ((("[classname]#And# (filter)")))
+((("[classname]#Or# (filter)")))
++
+These logical operator filters are composite filters that combine multiple other
+filters.
+
+[classname]#Not#:: ((("[classname]#Not# (filter)")))
++
+The logical unary operator filter negates which items are passed by the filter
+given as the parameter.
+
+
+
+
+[[datamodel.container.filtered.custom]]
+=== Implementing Custom Filters
+
+A custom filter needs to implement the [classname]#Container.Filter# interface.
+
+A filter can use a single or multiple properties for the filtering logic. The
+properties used by the filter must be returned with the
+[methodname]#appliesToProperty()# method. If the filter applies to a
+user-defined property or properties, it is customary to give the properties as
+the first argument for the constructor of the filter.
+
+
+----
+class MyCustomFilter implements Container.Filter {
+    protected String propertyId;
+    protected String regex;
+    
+    public MyCustomFilter(String propertyId, String regex) {
+        this.propertyId = propertyId;
+        this.regex      = regex;
+    }
+
+    /** Tells if this filter works on the given property. */
+    @Override
+    public boolean appliesToProperty(Object propertyId) {
+        return propertyId != null &&
+               propertyId.equals(this.propertyId);
+    }
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.filter.custom[on-line example, window="_blank"].
+
+The actual filtering logic is done in the [methodname]#passesFilter()# method,
+which simply returns [literal]#++true++# if the item should pass the filter and
+[literal]#++false++# if it should be filtered out.
+
+
+----
+    /** Apply the filter on an item to check if it passes. */
+    @Override
+    public boolean passesFilter(Object itemId, Item item)
+            throws UnsupportedOperationException {
+        // Acquire the relevant property from the item object
+        Property p = item.getItemProperty(propertyId);
+        
+        // Should always check validity
+        if (p == null || !p.getType().equals(String.class))
+            return false;
+        String value = (String) p.getValue();
+        
+        // The actual filter logic
+        return value.matches(regex);
+    }
+}
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.filter.custom[on-line example, window="_blank"].
+
+You can use such a custom filter just like any other:
+
+
+----
+c.addContainerFilter(
+    new MyCustomFilter("Name", (String) tf.getValue()));
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.container.filter.custom[on-line example, window="_blank"].
+
+
+(((range="endofrange", startref="term.datamodel.container.filtered.filters")))
+(((range="endofrange", startref="term.datamodel.container.filtered.filterable")))
+
+(((range="endofrange", startref="term.datamodel.container")))
+
+
diff --git a/documentation/datamodel/datamodel-itembinding.asciidoc b/documentation/datamodel/datamodel-itembinding.asciidoc
new file mode 100644
index 0000000000..fd21b72267
--- /dev/null
+++ b/documentation/datamodel/datamodel-itembinding.asciidoc
@@ -0,0 +1,377 @@
+---
+title: Creating Forms by Binding Fields to Items
+order: 4
+layout: page
+---
+
+[[datamodel.itembinding]]
+= Creating Forms by Binding Fields to Items
+
+Most applications in existence have forms of some sort. Forms contain fields,
+which you want to bind to a data source, an item in the Vaadin data model.
+[classname]#FieldGroup# provides an easy way to bind fields to the properties of
+an item. You can use it by first creating a layout with some fields, and then
+call it to bind the fields to the data source. You can also let the
+[classname]#FieldGroup# create the fields using a field factory. It can also
+handle commits. Notice that [classname]#FieldGroup# is not a user interface
+component, so you can not add it to a layout.
+
+[[datamodel.itembinding.simple]]
+== Simple Binding
+
+Let us start with a data model that has an item with a couple of properties. The
+item could be any item type, as described earlier.
+
+
+----
+// Have an item
+PropertysetItem item = new PropertysetItem();
+item.addItemProperty("name", new ObjectProperty<String>("Zaphod"));
+item.addItemProperty("age", new ObjectProperty<Integer>(42));
+----
+
+Next, you would design a form for editing the data. The [classname]#FormLayout#
+(
+<<dummy/../../../framework/layout/layout-formlayout#layout.formlayout,"FormLayout">>
+is ideal for forms, but you could use any other layout as well.
+
+
+----
+// Have some layout and create the fields
+FormLayout form = new FormLayout();
+
+TextField nameField = new TextField("Name");
+form.addComponent(nameField);
+
+TextField ageField = new TextField("Age");
+form.addComponent(ageField);
+----
+
+Then, we can bind the fields to the data as follows:
+
+
+----
+// Now create the binder and bind the fields
+FieldGroup binder = new FieldGroup(item);
+binder.bind(nameField, "name");
+binder.bind(ageField, "age");
+----
+
+The above way of binding is not different from simply calling
+[methodname]#setPropertyDataSource()# for the fields. It does, however, register
+the fields in the field group, which for example enables buffering or validation
+of the fields using the field group, as described in
+<<datamodel.itembinding.buffering>>.
+
+Next, we consider more practical uses for a [classname]#FieldGroup#.
+
+
+[[datamodel.itembinding.fieldfactory]]
+== Using a [interfacename]#FieldFactory# to Build and Bind Fields
+
+Using the [methodname]#buildAndBind()# methods, [classname]#FieldGroup# can
+create fields for you using a [interfacename]#FieldGroupFieldFactory#, but you
+still have to add them to the correct position in your layout.
+
+
+----
+// Have some layout
+FormLayout form = new FormLayout();
+        
+// Now create a binder that can also create the fields
+// using the default field factory
+FieldGroup binder = new FieldGroup(item);
+form.addComponent(binder.buildAndBind("Name", "name"));
+form.addComponent(binder.buildAndBind("Age", "age"));
+----
+
+
+[[datamodel.itembinding.formclass]]
+== Binding Member Fields
+
+The [methodname]#bindMemberFields()# method in [classname]#FieldGroup# uses
+reflection to bind the properties of an item to field components that are member
+variables of a class. Hence, if you implement a form as a class with the fields
+stored as member variables, you can use this method to bind them super-easy.
+
+The item properties are mapped to the members by the property ID and the name of
+the member variable. If you want to map a property with a different ID to a
+member, you can use the [literal]#++@PropertyId++# annotation for the member,
+with the property ID as the parameter.
+
+For example:
+
+
+----
+// Have an item
+PropertysetItem item = new PropertysetItem();
+item.addItemProperty("name", new ObjectProperty<String>("Zaphod"));
+item.addItemProperty("age", new ObjectProperty<Integer>(42));
+
+// Define a form as a class that extends some layout
+class MyForm extends FormLayout {
+    // Member that will bind to the "name" property
+    TextField name = new TextField("Name");
+    
+    // Member that will bind to the "age" property 
+    @PropertyId("age")
+    TextField ageField = new TextField("Age");
+    
+    public MyForm() {
+        // Customize the layout a bit
+        setSpacing(true);
+        
+        // Add the fields
+        addComponent(name);
+        addComponent(ageField);
+    }
+}
+        
+// Create one
+MyForm form = new MyForm();
+        
+// Now create a binder that can also creates the fields
+// using the default field factory
+FieldGroup binder = new FieldGroup(item);
+binder.bindMemberFields(form);
+
+// And the form can be used in an higher-level layout
+layout.addComponent(form);
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.itembinding.formclass.extended[on-line example, window="_blank"].
+
+[[datamodel.itembinding.formclass.customcomponent]]
+=== Encapsulating in [classname]#CustomComponent#
+
+Using a [classname]#CustomComponent# can be better for hiding the implementation
+details than extending a layout. Also, the use of the [classname]#FieldGroup#
+can be encapsulated in the form class.
+
+Consider the following as an alternative for the form implementation presented
+earlier:
+
+
+----
+// A form component that allows editing an item
+class MyForm extends CustomComponent {
+    // Member that will bind to the "name" property
+    TextField name = new TextField("Name");
+    
+    // Member that will bind to the "age" property 
+    @PropertyId("age")
+    TextField ageField = new TextField("Age");
+    
+    public MyForm(Item item) {
+        FormLayout layout = new FormLayout();
+        layout.addComponent(name);
+        layout.addComponent(ageField);
+        
+        // Now use a binder to bind the members
+        FieldGroup binder = new FieldGroup(item);
+        binder.bindMemberFields(this);
+
+        setCompositionRoot(layout);
+    }
+}
+        
+// And the form can be used as a component
+layout.addComponent(new MyForm(item));
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.itembinding.formclass.customcomponent[on-line example, window="_blank"].
+
+
+
+[[datamodel.itembinding.buffering]]
+== Buffering Forms
+
+Just like for individual fields, as described in
+<<dummy/../../../framework/components/components-fields#components.fields.buffering,"Field
+Buffering">>, a [classname]#FieldGroup# can handle buffering the form content so
+that it is written to the item data source only when [methodname]#commit()# is
+called for the group. It runs validation for all fields in the group and writes
+their values to the item data source only if all fields pass the validation.
+Edits can be discarded, so that the field values are reloaded from the data
+source, by calling [methodname]#discard()#. Buffering is enabled by default, but
+can be disabled by calling [methodname]#setBuffered(false)# for the
+[classname]#FieldGroup#.
+
+
+----
+// Have an item of some sort
+final PropertysetItem item = new PropertysetItem();
+item.addItemProperty("name", new ObjectProperty<String>("Q"));
+item.addItemProperty("age",  new ObjectProperty<Integer>(42));
+
+// Have some layout and create the fields
+Panel form = new Panel("Buffered Form");
+form.setContent(new FormLayout());
+
+// Build and bind the fields using the default field factory
+final FieldGroup binder = new FieldGroup(item);
+form.addComponent(binder.buildAndBind("Name", "name"));
+form.addComponent(binder.buildAndBind("Age",  "age"));
+
+// Enable buffering (actually enabled by default)
+binder.setBuffered(true);
+        
+// A button to commit the buffer
+form.addComponent(new Button("OK", new ClickListener() {
+    @Override
+    public void buttonClick(ClickEvent event) {
+        try {
+            binder.commit();
+            Notification.show("Thanks!");
+        } catch (CommitException e) {
+            Notification.show("You fail!");
+        }
+    }
+}));
+
+// A button to discard the buffer
+form.addComponent(new Button("Discard", new ClickListener() {
+    @Override
+    public void buttonClick(ClickEvent event) {
+        binder.discard();
+        Notification.show("Discarded!");
+    }
+}));
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.itembinding.formclass.customcomponent[on-line example, window="_blank"].
+
+
+[[datamodel.itembinding.beans]]
+== Binding Fields to a Bean
+
+The [classname]#BeanFieldGroup# makes it easier to bind fields to a bean. It
+also handles binding to nested beans properties. The build a field bound to a
+nested bean property, identify the property with dot notation. For example, if a
+[classname]#Person# bean has a [literal]#++address++# property with an
+[classname]#Address# type, which in turn has a [literal]#++street++# property,
+you could build a field bound to the property with
+[methodname]#buildAndBind("Street", "address.street")#.
+
+The input to fields bound to a bean can be validated using the Java Bean
+Validation API, as described in <<datamodel.itembinding.beanvalidation>>. The
+[classname]#BeanFieldGroup# automatically adds a [classname]#BeanValidator# to
+every field if a bean validation implementation is included in the classpath.
+
+
+[[datamodel.itembinding.beanvalidation]]
+== Bean Validation
+
+Vaadin allows using the Java Bean Validation API 1.0 (JSR-303) for validating
+input from fields bound to bean properties before the values are committed to
+the bean. The validation is done based on annotations on the bean properties,
+which are used for creating the actual validators automatically. See
+<<dummy/../../../framework/components/components-fields#components.fields.validation,"Field
+Validation">> for general information about validation.
+
+Using bean validation requires an implementation of the Bean Validation API,
+such as Hibernate Validator ( [filename]#hibernate-validator-4.2.0.Final.jar# or
+later) or Apache Bean Validation. The implementation JAR must be included in the
+project classpath when using the bean validation, or otherwise an internal error
+is thrown.
+
+Bean validation is especially useful when persisting entity beans with the
+Vaadin JPAContainer, described in
+<<dummy/../../../framework/jpacontainer/jpacontainer-overview.asciidoc#jpacontainer.overview,"Vaadin
+JPAContainer">>.
+
+[[datamodel.itembinding.beanvalidation.annotations]]
+=== Annotations
+
+The validation constraints are defined as annotations. For example, consider the
+following bean:
+
+
+----
+// Here is a bean
+public class Person implements Serializable {
+    @NotNull
+    @javax.validation.constraints.Size(min=2, max=10)
+    String name;
+    
+    @Min(1)
+    @Max(130)
+    int age;
+    
+    // ... setters and getters ...
+}
+----
+
+For a complete list of allowed constraints for different data types, please see
+the link:http://docs.oracle.com/javaee/6/tutorial/doc/gircz.html[Bean Validation
+API documentation].
+
+
+[[datamodel.itembinding.beanvalidation.validating]]
+=== Validating the Beans
+
+Validating a bean is done with a [classname]#BeanValidator#, which you
+initialize with the name of the bean property it should validate and add it the
+the editor field.
+
+In the following example, we validate a single unbuffered field:
+
+
+----
+Person bean = new Person("Mung bean", 100);
+BeanItem<Person> item = new BeanItem<Person> (bean);
+    
+// Create an editor bound to a bean field
+TextField firstName = new TextField("First Name",
+        item.getItemProperty("name"));
+    
+// Add the bean validator
+firstName.addValidator(new BeanValidator(Person.class, "name"));
+    
+firstName.setImmediate(true);
+layout.addComponent(firstName);
+----
+
+In this case, the validation is done immediately after focus leaves the field.
+You could do the same for the other field as well.
+
+Bean validators are automatically created when using a
+[classname]#BeanFieldGroup#.
+
+
+----
+// Have a bean
+Person bean = new Person("Mung bean", 100);
+        
+// Form for editing the bean
+final BeanFieldGroup<Person> binder =
+        new BeanFieldGroup<Person>(Person.class);
+binder.setItemDataSource(bean);
+layout.addComponent(binder.buildAndBind("Name", "name"));
+layout.addComponent(binder.buildAndBind("Age", "age"));
+
+// Buffer the form content
+binder.setBuffered(true);
+layout.addComponent(new Button("OK", new ClickListener() {
+    @Override
+    public void buttonClick(ClickEvent event) {
+        try {
+            binder.commit();
+        } catch (CommitException e) {
+        }
+    }
+}));
+----
+
+
+[[datamodel.itembinding.beanvalidation.locale]]
+=== Locale Setting for Bean Validation
+
+The validation error messages are defined in the bean validation implementation,
+in a [filename]#ValidationMessages.properties# file. The message is shown in the
+language specified with the locale setting for the form. The default language is
+English, but for example Hibernate Validator contains translations of the
+messages for a number of languages. If other languages are needed, you need to
+provide a translation of the properties file.
+
+
+
+
+
diff --git a/documentation/datamodel/datamodel-items.asciidoc b/documentation/datamodel/datamodel-items.asciidoc
new file mode 100644
index 0000000000..75a7c1ecf8
--- /dev/null
+++ b/documentation/datamodel/datamodel-items.asciidoc
@@ -0,0 +1,194 @@
+---
+title: Holding properties in Items
+order: 3
+layout: page
+---
+
+[[datamodel.items]]
+= Holding properties in Items
+
+The [classname]#Item# interface provides access to a set of named properties.
+Each property is identified by a __property identifier__ (PID) and a reference
+to such a property can be queried from an [classname]#Item# with
+[methodname]#getItemProperty()# using the identifier.
+
+Examples on the use of items include rows in a [classname]#Table#, with the
+properties corresponding to table columns, nodes in a [classname]#Tree#, and the
+the data bound to a [classname]#Form#, with item's properties bound to
+individual form fields.
+
+Items are generally equivalent to objects in the object-oriented model, but with
+the exception that they are configurable and provide an event handling
+mechanism. The simplest way to utilize [classname]#Item# interface is to use
+existing implementations. Provided utility classes include a configurable
+property set ( [classname]#PropertysetItem#) and a bean-to-item adapter (
+[classname]#BeanItem#). Also, a [classname]#Form# implements the interface and
+can therefore be used directly as an item.
+
+In addition to being used indirectly by many user interface components, items
+provide the basic data model underlying the [classname]#Form# component. In
+simple cases, forms can even be generated automatically from items. The
+properties of the item correspond to the fields of the form.
+
+The [classname]#Item# interface defines inner interfaces for maintaining the
+item property set and listening changes made to it.
+[classname]#PropertySetChangeEvent# events can be emitted by a class
+implementing the [classname]#PropertySetChangeNotifier# interface. They can be
+received through the [classname]#PropertySetChangeListener# interface.
+
+ifdef::web[]
+[[datamodel.items.propertysetitem]]
+== The [classname]#PropertysetItem# Implementation
+
+The [classname]#PropertysetItem# is a generic implementation of the
+[classname]#Item# interface that allows storing properties. The properties are
+added with [methodname]#addItemProperty()#, which takes a name and the property
+as parameters.
+
+The following example demonstrates a typical case of collecting
+[classname]#ObjectProperty# properties in an item:
+
+
+----
+PropertysetItem item = new PropertysetItem();
+item.addItemProperty("name", new ObjectProperty("Zaphod"));
+item.addItemProperty("age", new ObjectProperty(42));
+        
+// Bind it to a component
+Form form = new Form();
+form.setItemDataSource(item);
+----
+
+endif::web[]
+
+[[datamodel.items.beanitem]]
+== Wrapping a Bean in a [classname]#BeanItem#
+
+The [classname]#BeanItem# implementation of the [classname]#Item# interface is a
+wrapper for Java Bean objects. In fact, only the setters and getters are
+required while serialization and other bean features are not, so you can wrap
+almost any POJOs with minimal requirements.
+
+
+----
+// Here is a bean (or more exactly a POJO)
+class Person {
+    String name;
+    int    age;
+    
+    public String getName() {
+        return name;
+    }
+    
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public Integer getAge() {
+        return age;
+    }
+    
+    public void setAge(Integer age) {
+        this.age = age.intValue();
+    }
+}
+
+// Create an instance of the bean
+Person bean = new Person();
+        
+// Wrap it in a BeanItem
+BeanItem<Person> item = new BeanItem<Person>(bean);
+        
+// Bind it to a component
+Form form = new Form();
+form.setItemDataSource(item);
+----
+
+You can use the [methodname]#getBean()# method to get a reference to the
+underlying bean.
+
+[[datamodel.items.beanitem.nested]]
+=== Nested Beans
+
+You may often have composite classes where one class "has a" another class. For
+example, consider the following [classname]#Planet# class which "has a"
+discoverer:
+
+
+----
+// Here is a bean with two nested beans
+public class Planet implements Serializable {
+    String name;
+    Person discoverer;
+    
+    public Planet(String name, Person discoverer) {
+        this.name = name;
+        this.discoverer = discoverer;
+    }
+
+    ... getters and setters ...
+}
+
+...
+// Create an instance of the bean
+Planet planet = new Planet("Uranus",
+                    new Person("William Herschel", 1738));
+----
+
+When shown in a [classname]#Form#, for example, you would want to list the
+properties of the nested bean along the properties of the composite bean. You
+can do that by binding the properties of the nested bean individually with a
+[classname]#MethodProperty# or [classname]#NestedMethodProperty#. You should
+usually hide the nested bean from binding as a property by listing only the
+bound properties in the constructor.
+
+
+----
+// Wrap it in a BeanItem and hide the nested bean property
+BeanItem<Planet> item = new BeanItem<Planet>(planet,
+        new String[]{"name"});
+    
+// Bind the nested properties.
+// Use NestedMethodProperty to bind using dot notation.
+item.addItemProperty("discoverername",
+    new NestedMethodProperty(planet, "discoverer.name"));
+    
+// The other way is to use regular MethodProperty.
+item.addItemProperty("discovererborn",
+     new MethodProperty<Person>(planet.getDiscoverer(),
+                                "born"));
+----
+
+The difference is that [classname]#NestedMethodProperty# does not access the
+nested bean immediately but only when accessing the property values, while when
+using [classname]#MethodProperty# the nested bean is accessed when creating the
+method property. The difference is only significant if the nested bean can be
+null or be changed later.
+
+You can use such a bean item for example in a [classname]#Form# as follows:
+
+
+----
+// Bind it to a component
+Form form = new Form();
+form.setItemDataSource(item);
+    
+// Nicer captions
+form.getField("discoverername").setCaption("Discoverer");
+form.getField("discovererborn").setCaption("Born");
+----
+
+[[figure.datamodel.items.beanitem.nested]]
+.A [classname]#Form# with Nested Bean Properties
+image::img/beanitem-nested-beans.png[]
+
+The [classname]#BeanContainer# and [classname]#BeanItemContainer# allow easy
+definition of nested bean properties with
+[methodname]#addNestedContainerProperty()#, as described in
+<<dummy/../../../framework/datamodel/datamodel-container#datamodel.container.beancontainer.nestedproperties,"Nested
+Properties">>.
+
+
+
+
+
diff --git a/documentation/datamodel/datamodel-overview.asciidoc b/documentation/datamodel/datamodel-overview.asciidoc
new file mode 100644
index 0000000000..e053400776
--- /dev/null
+++ b/documentation/datamodel/datamodel-overview.asciidoc
@@ -0,0 +1,75 @@
+---
+title: Overview
+order: 1
+layout: page
+---
+
+[[datamodel.overview]]
+= Overview
+
+The Vaadin Data Model is one of the core concepts of the library. To allow the
+view (user interface components) to access the data model of an application
+directly, we have introduced a standard data interface.
+
+The model allows binding user interface components directly to the data that
+they display and possibly allow to edit. There are three nested levels of
+hierarchy in the data model: __property__, __item__, and __container__. Using a
+spreadsheet application as an analogy, these would correspond to a cell, a row,
+and a table, respectively.
+
+.Vaadin Data Model
+image::img/datamodel-whitebg.png[]
+
+The Data Model is realized as a set of interfaces in the
+[classname]#com.vaadin.data# package. The package contains the
+[classname]#Property#, [classname]#Item#, and [classname]#Container# interfaces,
+along with a number of more specialized interfaces and classes.
+
+Notice that the Data Model does not define data representation, but only
+interfaces. This leaves the representation fully to the implementation of the
+containers. The representation can be almost anything, such as a plain old Java
+object (POJO) structure, a filesystem, or a database query.
+
+The Data Model is used heavily in the core user interface components of Vaadin,
+especially the field components, that is, components that implement the
+[classname]#Field# interface or more typically extend
+[classname]#AbstractField#, which defines many common features. A key feature of
+all the built-in field components is that they can either maintain their data by
+themselves or be bound to an external data source. The value of a field is
+always available through the [classname]#Property# interface. As more than one
+component can be bound to the same data source, it is easy to implement various
+viewer-editor patterns.
+
+The relationships of the various interfaces are shown in
+<<figure.datamodel.overview.relationships>>; the value change event and listener
+interfaces are shown only for the [classname]#Property# interface, while the
+notifier interfaces are omitted altogether.
+
+[[figure.datamodel.overview.relationships]]
+.Interface Relationships in Vaadin Data Model
+image::img/datamodel-interfaces-hi.png[]
+
+The Data Model has many important and useful features, such as support for
+change notification. Especially containers have many helper interfaces,
+including ones that allow indexing, ordering, sorting, and filtering the data.
+Also [classname]#Field# components provide a number of features involving the
+data model, such as buffering, validation, and lazy loading.
+
+Vaadin provides a number of built-in implementations of the data model
+interfaces. The built-in implementations are used as the default data models in
+many field components.
+
+In addition to the built-in implementations, many data model implementations,
+such as containers, are available as add-ons, either from the Vaadin Directory
+or from independent sources. Both commercial and free implementations exist. The
+JPAContainer, described in
+<<dummy/../../../framework/jpacontainer/jpacontainer-overview.asciidoc#jpacontainer.overview,"Vaadin
+JPAContainer">>, is the most often used conmmercial container add-on. The
+installation of add-ons is described in
+<<dummy/../../../framework/addons/addons-overview.asciidoc#addons.overview,"Using
+Vaadin Add-ons">>. Notice that unlike with most regular add-on components, you
+do not need to compile a widget set for add-ons that include just data model
+implementations.
+
+
+
diff --git a/documentation/datamodel/datamodel-properties.asciidoc b/documentation/datamodel/datamodel-properties.asciidoc
new file mode 100644
index 0000000000..d5d0d3e39d
--- /dev/null
+++ b/documentation/datamodel/datamodel-properties.asciidoc
@@ -0,0 +1,399 @@
+---
+title: Properties
+order: 2
+layout: page
+---
+
+[[datamodel.properties]]
+= Properties
+
+The [interfacename]#Property# interface is the base of the Vaadin Data Model. It
+provides a standardized API for a single data value object that can be read
+(get) and written (set). A property is always typed, but can optionally support
+data type conversions. The type of a property can be any Java class. Optionally,
+properties can provide value change events for following their changes.
+
+You can set the value of a property with [methodname]#setValue()# and read with
+[methodname]#getValue()#.
+
+In the following, we set and read the property value from a
+[classname]#TextField# component, which implements the [interfacename]#Property#
+interface to allow accessing the field value.
+
+
+----
+final TextField tf = new TextField("Name");
+        
+// Set the value
+tf.setValue("The text field value");
+        
+// When the field value is edited by the user
+tf.addValueChangeListener(
+    new Property.ValueChangeListener() {
+    public void valueChange(ValueChangeEvent event) {
+        // Do something with the new value
+        layout.addComponent(new Label(tf.getValue()));
+    }
+});
+----
+See the http://demo.vaadin.com/book-examples-vaadin7/book#datamodel.properties.basic[on-line example, window="_blank"].
+
+Changes in the property value usually fire a [classname]#ValueChangeEvent#,
+which can be handled with a [classname]#ValueChangeListener#. The event object
+provides reference to the property with [methodname]#getProperty()#. Note that
+its [methodname]#getValue()# method returns the value with [classname]#Object#
+type, so you need to cast it to the proper type.
+
+Properties are in themselves unnamed. They are collected in __items__, which
+associate the properties with names: the __Property Identifiers__ or __PID__s.
+Items can be further contained in containers and are identified with __Item
+Identifiers__ or __IID__s. In the spreadsheet analogy, __Property Identifiers__
+would correspond to column names and __Item Identifiers__ to row names. The
+identifiers can be arbitrary objects, but must implement the
+[methodname]#equals(Object)# and [methodname]#hashCode()# methods so that they
+can be used in any standard Java [classname]#Collection#.
+
+The [classname]#Property# interface can be utilized either by implementing the
+interface or by using some of the built-in property implementations. Vaadin
+includes a [classname]#Property# interface implementation for arbitrary function
+pairs and bean properties, with the [classname]#MethodProperty# class, and for
+simple object properties, with the [classname]#ObjectProperty# class, as
+described later.
+
+In addition to the simple components, selection components provide their current
+selection as the property value. In single selection mode, the property is a
+single item identifier, while in multiple selection mode it is a set of item
+identifiers. See the documentation of the selection components for further
+details.
+
+Components that can be bound to a property have an internal default data source
+object, typically a [classname]#ObjectProperty#, which is described later. As
+all such components are viewers or editors, also described later, so you can
+rebind a component to any data source with
+[methodname]#setPropertyDataSource()#.
+
+[[datamodel.properties.viewers]]
+== Property Viewers and Editors
+
+The most important function of the [classname]#Property# as well as of the other
+data model interfaces is to connect classes implementing the interface directly
+to editor and viewer classes. This means connecting a data source (model) to a
+user interface component (views) to allow editing or viewing the data model.
+
+A property can be bound to a component implementing the [classname]#Viewer#
+interface with [methodname]#setPropertyDataSource()#.
+
+
+----
+// Have a data model
+ObjectProperty property =
+    new ObjectProperty("Hello", String.class);
+        
+// Have a component that implements Viewer
+Label viewer = new Label();
+        
+// Bind it to the data
+viewer.setPropertyDataSource(property);
+----
+
+You can use the same method in the [classname]#Editor# interface to bind a
+component that allows editing a particular property type to a property.
+
+
+----
+// Have a data model
+ObjectProperty property =
+    new ObjectProperty("Hello", String.class);
+        
+// Have a component that implements Viewer
+TextField editor = new TextField("Edit Greeting");
+        
+// Bind it to the data
+editor.setPropertyDataSource(property);
+
+----
+
+As all field components implement the [classname]#Property# interface, you can
+bind any component implementing the [classname]#Viewer# interface to any field,
+assuming that the viewer is able the view the object type of the field.
+Continuing from the above example, we can bind a [classname]#Label# to the
+[classname]#TextField# value:
+
+
+----
+Label viewer = new Label();
+viewer.setPropertyDataSource(editor);
+
+// The value shown in the viewer is updated immediately
+// after editing the value in the editor (once it
+// loses the focus)
+editor.setImmediate(true);
+----
+
+If a field has validators, as described in
+<<dummy/../../../framework/components/components-fields#components.fields.validation,"Field
+Validation">>, the validators are executed before writing the value to the
+property data source, or by calling the [methodname]#validate()# or
+[methodname]#commit()# for the field.
+
+
+[[datamodel.properties.objectproperty]]
+== [classname]#ObjectProperty# Implementation
+
+The [classname]#ObjectProperty# class is a simple implementation of the
+[classname]#Property# interface that allows storing an arbitrary Java object.
+
+
+----
+// Have a component that implements Viewer interface
+final TextField tf = new TextField("Name");
+        
+// Have a data model with some data
+String myObject = "Hello";
+        
+// Wrap it in an ObjectProperty
+ObjectProperty property =
+    new ObjectProperty(myObject, String.class);
+        
+// Bind the property to the component
+tf.setPropertyDataSource(property);
+----
+
+
+[[datamodel.properties.converter]]
+== Converting Between Property Type and Representation
+
+Fields allow editing a certain type, such as a [classname]#String# or
+[classname]#Date#. The bound property, on the other hand, could have some
+entirely different type. Conversion between a representation edited by the field
+and the model defined in the property is handler with a converter that
+implements the [interfacename]#Converter# interface.
+
+Most common type conversions, such as between string and integer, are handled by
+the default converters. They are created in a converter factory global in the
+application.
+
+[[datamodel.properties.converter.basic]]
+=== Basic Use of Converters
+
+The [methodname]#setConverter([interfacename]#Converter#)# method sets the
+converter for a field. The method is defined in [classname]#AbstractField#.
+
+
+----
+// Have an integer property
+final ObjectProperty<Integer> property =
+        new ObjectProperty<Integer>(42); 
+        
+// Create a TextField, which edits Strings
+final TextField tf = new TextField("Name");
+
+// Use a converter between String and Integer
+tf.setConverter(new StringToIntegerConverter());
+
+// And bind the field
+tf.setPropertyDataSource(property);
+----
+
+The built-in converters are the following:
+
+[[datamodel.properties.converter.basic.built-in]]
+.Built-in Converters
+[options="header"]
+|===============
+|Converter|Representation|Model
+|[classname]#StringToIntegerConverter#|[classname]#String#|[classname]#Integer#
+|[classname]#StringToDoubleConverter#|[classname]#String#|[classname]#Double#
+|[classname]#StringToNumberConverter#|[classname]#String#|[classname]#Number#
+|[classname]#StringToBooleanConverter#|[classname]#String#|[classname]#Boolean#
+|[classname]#StringToDateConverter#|[classname]#String#|[classname]#Date#
+|[classname]#DateToLongConverter#|[classname]#Date#|[classname]#Long#
+
+|===============
+
+
+
+In addition, there is a [classname]#ReverseConverter# that takes a converter as
+a parameter and reverses the conversion direction.
+
+If a converter already exists for a type, the
+[methodname]#setConverter([interfacename]#Class#)# retrieves the converter for
+the given type from the converter factory, and then sets it for the field. This
+method is used implicitly when binding field to a property data source.
+
+
+[[datamodel.properties.converter.custom]]
+=== Implementing a Converter
+
+A conversion always occurs between a __representation type__, edited by the
+field component, and a __model type__, that is, the type of the property data
+source. Converters implement the [interfacename]#Converter# interface defined in
+the [package]#com.vaadin.data.util.converter# package.
+
+For example, let us assume that we have a simple [classname]#Complex# type for
+storing complex values.
+
+
+----
+public class ComplexConverter
+       implements Converter<String, Complex> {
+    @Override
+    public Complex convertToModel(String value, Locale locale)
+            throws ConversionException {
+        String parts[] =
+            value.replaceAll("[\\(\\)]", "").split(",");
+        if (parts.length != 2)
+            throw new ConversionException(
+                    "Unable to parse String to Complex");
+        return new Complex(Double.parseDouble(parts[0]),
+                           Double.parseDouble(parts[1]));
+    }
+
+    @Override
+    public String convertToPresentation(Complex value,
+                                        Locale locale)
+            throws ConversionException {
+        return "("+value.getReal()+","+value.getImag()+")";
+    }
+
+    @Override
+    public Class<Complex> getModelType() {
+        return Complex.class;
+    }
+
+    @Override
+    public Class<String> getPresentationType() {
+        return String.class;
+    }
+}
+----
+
+The conversion methods get the locale for the conversion as a parameter.
+
+
+[[datamodel.properties.converter.converterfactory]]
+=== Converter Factory
+
+If a field does not directly allow editing a property type, a default converter
+is attempted to create using an application-global converter factory. If you
+define your own converters that you wish to include in the converter factory,
+you need to implement one yourself. While you could implement the
+[interfacename]#ConverterFactory# interface, it is usually easier to just extend
+[classname]#DefaultConverterFactory#.
+
+
+----
+class MyConverterFactory extends DefaultConverterFactory {
+    @Override
+    public <PRESENTATION, MODEL> Converter<PRESENTATION, MODEL>
+            createConverter(Class<PRESENTATION> presentationType,
+                            Class<MODEL> modelType) {
+        // Handle one particular type conversion
+        if (String.class == presentationType &&
+            Complex.class == modelType)
+            return (Converter<PRESENTATION, MODEL>)
+                   new ComplexConverter();
+
+        // Default to the supertype
+        return super.createConverter(presentationType,
+                                     modelType);
+    }
+}
+
+// Use the factory globally in the application
+Application.getCurrentApplication().setConverterFactory(
+        new MyConverterFactory());
+----
+
+
+
+ifdef::web[]
+[[datamodel.properties.implementing]]
+== Implementing the [classname]#Property# Interface
+
+Implementation of the [classname]#Property# interface requires defining setters
+and getters for the value and the __read-only__ mode. Only a getter is needed
+for the property type, as the type is often fixed in property implementations.
+
+The following example shows a simple implementation of the [classname]#Property#
+interface:
+
+
+----
+class MyProperty implements Property {
+    Integer data     = 0;
+    boolean readOnly = false;
+    
+    // Return the data type of the model
+    public Class<?> getType() {
+        return Integer.class;
+    }
+
+    public Object getValue() {
+        return data;
+    }
+    
+    // Override the default implementation in Object
+    @Override
+    public String toString() {
+        return Integer.toHexString(data);
+    }
+
+    public boolean isReadOnly() {
+        return readOnly;
+    }
+
+    public void setReadOnly(boolean newStatus) {
+        readOnly = newStatus;
+    }
+
+    public void setValue(Object newValue)
+            throws ReadOnlyException, ConversionException {
+        if (readOnly)
+            throw new ReadOnlyException();
+            
+        // Already the same type as the internal representation
+        if (newValue instanceof Integer)
+            data = (Integer) newValue;
+        
+        // Conversion from a string is required
+        else if (newValue instanceof String)
+            try {
+                data = Integer.parseInt((String) newValue, 16);
+            } catch (NumberFormatException e) {
+                throw new ConversionException();
+            }
+        else
+             // Don't know how to convert any other types
+            throw new ConversionException();
+
+        // Reverse decode the hexadecimal value
+    }
+}
+        
+// Instantiate the property and set its data
+MyProperty property = new MyProperty();
+property.setValue(42);
+        
+// Bind it to a component
+final TextField tf = new TextField("Name", property);
+----
+
+The components get the displayed value by the [methodname]#toString()# method,
+so it is necessary to override it. To allow editing the value, value returned in
+the [methodname]#toString()# must be in a format that is accepted by the
+[methodname]#setValue()# method, unless the property is read-only. The
+[methodname]#toString()# can perform any type conversion necessary to make the
+internal type a string, and the [methodname]#setValue()# must be able to make a
+reverse conversion.
+
+The implementation example does not notify about changes in the property value
+or in the read-only mode. You should normally also implement at least the
+[classname]#Property.ValueChangeNotifier# and
+[classname]#Property.ReadOnlyStatusChangeNotifier#. See the
+[classname]#ObjectProperty# class for an example of the implementation.
+
+endif::web[]
+
+
+
diff --git a/documentation/datamodel/img/beanitem-nested-beans.png b/documentation/datamodel/img/beanitem-nested-beans.png
new file mode 100644
index 0000000000..ea8c51ccd4
--- /dev/null
+++ b/documentation/datamodel/img/beanitem-nested-beans.png
diff --git a/documentation/datamodel/img/beanitemcontainer-nested-beans.png b/documentation/datamodel/img/beanitemcontainer-nested-beans.png
new file mode 100644
index 0000000000..fbd5fa155a
--- /dev/null
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diff --git a/documentation/datamodel/img/datamodel-interfaces-hi.png b/documentation/datamodel/img/datamodel-interfaces-hi.png
new file mode 100644
index 0000000000..9bebdb0ac0
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new file mode 100644
index 0000000000..2139cf9f08
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