Hello,
I suggest you read up on some JSF tutorials on the web (or books) as Alfresco web-client makes heavy use of the JSF framework and techniques.
The "#{WizardManager.bean.objectTypes}" statement can be deconstructed as follows:
#{ - specifies the start of a JSF statement
WizardManager - the name of a JSF Managed Bean, which can generally be found in the faces-config-beans.xml config file.
bean - resolves to getBean() on the WizardManager bean instance
objectTypes - resolves to getObjectTypes() on the 'bean' object instance
} - specifies the end of the JSF statement
Basically JSF uses standard Bean notation to infer get() and set() calls to properties on a POJO bean class.
Thanks,
Kevin