Аннотация
Since the publication of the IMS LD specification it has been recognised
that the lack of a rich set of runtime
services is a major barrier to adoption. The approaches taken to resolving
this problem are reviewed, and their
strengths and limitations identified. A generic widget server developed
by the authors is described. Integration of
the widget server with the IMS LD runtime system provides an extensible
set of services. This has been demonstrated
with the creation of widgets for forums, messaging, vote, and Google
maps which are provided for users within the
context of their role and activities in a Unit of Learning. Authoring
and administration are described, showing how
the system is both extensible and portable.
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