Layouts 
This section describes the tasks that can be performed for layout semantic objects:
Positioning iViews on a Page: You can specify where within a container to place an iView that has already been added to the page.
Process
The ILayout interface also enables you to get information about a layout and its containers, with the help of the following methods:
getContainerID(): Returns the ID for a specific container in the layout. Specify the container by its name as defined in the portalapp.xml.
getContaineriViews(): Returns an array of strings that represent the atomic names of the iViews and pages within a specific container. Specify the container by its ID.
getContainerIDs(): Returns an array of strings that represents the IDs of the containers in the layout.
Information about creating, modifying and deleting layouts and other semantic objects: All Semantic Objects