Exploring tlds

Liferay exposes some of the default objects this is been done from the tag

and the corresponding class is com.liferay.taglib.theme.DefineObjectsTag

it exposes the objects like themeDisplay , layouts ,layout ,user ,theme etc


There is one more tag




It exposes the class
com.liferay.taglib.portlet.DefineObjectsTag

It exposes the objects like portletConfig , portletName , portletPreferences , portletPreferencesValues , portletSession , portletSessionScope and conditionally
actionResponse, eventResponse, renderResponse, resourceResponse based on the phase.


That is the reason we include these imports in all the pages.