ZK Dictionary

= Introduction =
ZK Framework uses a number of keywords to refer to specific concepts. These words may have a "general use" in English different than their use in the context of ZK.

You will find a short description of these concept below, as well as a link to a full documentation page explaining it in details.
This list is meant to be used as a reference page. If you are new to ZK, we encourage you to refer to it while you explore the rest of our documentation.

== [[ZK_Developer's_Reference/Architecture_Overview | Component]] ==
A component is a Java object existing at server-side representing a UI element. A component can be a simple control like a [[ZK_Component_Reference/Essential_Components/Button | Button]], or a complex control like a [[ZK_Component_Reference/Data/Grid]].

== [[ZK_Developer's_Reference/UI_Composing/Component-based_UI | Component tree]] ==
The component tree is a group of component organized in a tree structure. A component may have children, and these children can have their own descendants. A component has a single parent.
For example, a window contain a div, and the div contain two buttons.

== [[ZK_Developer's_Guide/Fundamental_ZK/Basic_Concepts/Page_and_Desktop | Page]] ==
A Page object represents the collection of components loaded from a zul file. It also acts as the root of the component tree.

== [[ZK_Developer's_Reference/Architecture_Overview | Widget]] ==
A widget is a JavaScript object existing at client-side. It is the client-side representation of a server-side Component.
The widget role is to pilot the DOM tree (the actual browser content) and to act as a communication relay between user actions and server updates.

== [[ZK_Developer's_Reference/Theming_and_Styling/Molds | Mold]] ==
A mold is an appearance applied to a component. ZK provide different apparences for some components, if they have different mode of operation.

== [[ZK_Developer's_Reference/MVC/Controller/Composer | Composer]] ==
A composer is a Java class that controls part or all of a ZK page. A composer can access components, update their properties and listen to user actions.

== [[ZK_Style_Customization_Guide/ZK_CSS_Class_Design/Sclass | Sclass]] ==
The sclass="customclass" attribute can be used by a developer to add a class="customclass" attribute on the DOM node created by the component. Its purpose it to easily add CSS styles to a ZK component.

- ListModel
- zul file
- desktop
- session
- execution
- Library property
- zk.xml
- lang-addon.xml