Standard Namespaces

Standard namespaces are not languages. That means they are not used to provide component definitions. Rather, they are used to provide special functionality to ZUML.

For introduction of languages vs standard namespaces, please refer to ZK Developer’s > References.

Namespace Description
zk Name: zk
Namespace: http://www.zkoss.org/2005/zk
Namespace shortcut: zk
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying ZK specific elements and attributes, such as the zk element and the unless attribute. For more information please refer to the ZK Namespace section.
native Name: native
Namespace: http://www.zkoss.org/2005/zk/native
Namespace shortcut: native
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying native elements. A native element represents a native tag at the client. For browsers, a native element represents a HTML tag. Unlike the xhtml language, there is no component associated with, so the performance is much better but you cannot change it dynamically.

For more information please refer to the Native Namespace section.
annotation Name: annotation
Namespace: http://www.zkoss.org/2005/zk/annotation
Namespace shortcut: annotation
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying annotations. For more information please refer to the annotation section.
client Name: client
Namespace: http://www.zkoss.org/2005/zk/client
Namespace shortcut: client
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying a ZK JavaScript widget’s event listeners and attributes. For more information please refer to the Client Namespace section.
client attribute Name: client/attribute
Namespace: http://www.zkoss.org/2005/zk/client/attribute
Namespace shortcut: client/attribute
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying client-side DOM attributes. Unlike the client namespace, which assigns something to widgets, the client/attribute namespace assigns to the DOM tree directly.

For more information please refer to the Client Attribute Namespace section.
client attribute prefix Name: client/attribute-prefix
Namespace: http://www.zkoss.org/2020/zk/client/attribute-prefix
Namespace shortcut: client/attribute-prefix
Java: `org.zkoss.zk.ui.metainfo.LanguageDefinition`

It is the reserved namespace for specifying the client-side DOM attributes including the prefix. Unlike the client namespace, which assigns something to widgets, the client/attribute-prefix namespace assigns to the DOM tree directly.

For more information please refer to the Client Attribute Prefix Namespace section.
xhtml Name: xhtml
Namespace: http://www.w3.org/1999/xhtml
Namespace shortcut: xhtml

It is the XHTML component set. For more information please refer to the the Languages section.
zul Name: xul/html
Namespace: http://www.zkoss.org/2005/zul
Namespace shortcut: zul

It is the ZUL component set. For more information please refer to the the Languages section.
xml Name: xml
Namespace: http://www.zkoss.org/2007/xml
Namespace shortcut: xml

It is the XML component set. For more information please refer to the the Languages section.
shadow Name: shadow
Namespace: http://www.zkoss.org/2015/shadow
Namespace shortcut: shadow

It is the reserved namespace for specifying shadow elements. For more information please refer to the Shadow Namespace.

For more information of XHTML, ZUL and other component sets, please refer to the Languages section.