Conceptually, the ORA model of a “modern UI” defines which three layers from the following list?
A.
Unified User Interface layer provides the control and visual elements that define the interaction
that the user has with the system.
B.
Integration layer provides connectors to simplify and standardize Interaction with back-end -terns.
C.
Device Management layer provides transformation and transcoding to support a wide variety of
devices.
D.
Browser Mediation layer adapts output to conform to the standards and capabilities of each
browser type.
E.
User Interface Services layer provides reusable functions specialized to the needs of the end
F.
Access and Incorporation layer provides the capability to Incorporate data and functionality from
any number of back-end systems into the user interface.
Explanation:
Note:A: The Unified User Interface layer provides the control and visual elements that define
the interaction the user has with the system. This layer separates the way the user
interacts with the system from the underlying functionality provided by the system.
This has many advantages including allowing different display devices to be
supported via control and visual elements specialized for the device since, for
example, mobile devices do not have nearly the screen real estate of a desktop
computer.
E: The User Interface Services layer provides a set of functionality that can be used and
reused in a variety of ways to deliver various user interfaces specialized to the needs
of the end user. This illustrates that the underlying functionality is separated from the
visual and control elements built into the user interface. The services provided by this
layer may come from a variety of sources located anywhere that is network accessible.
F: The Access and Incorporation layer provides the capability to incorporate data and
functionality from any number of backend systems into the user interface. Generally,
there are two types of backend systems that need be incorporated into the user
interface: systems that are designed for use with user interface (e.g. LDAP, dedicated
database) and systems that are not (e.g. legacy applications). The former type
systems can be access directly by the user interface architecture. Ideally the latter type
should be accessed via a robust integration architecture rather than relying on
point-to-point integrations.
This distinction is the reason that the term “incorporation” is used in this ConceptualView instead of the term “integration.” A suitable integration architecture is described
in the ORA Service-Oriented Integration document.
Reference: Oracle Reference Architecture, User Interaction, Release 3.0
