A Service Component Model and Implementation for Institutional Repositories - Advanced Design Approaches to Emerging Software Systems - page 69

Figure 3. Relationships between the components

to create a management system. In the first step,
the metadata is to be extracted from the digital re-
source first and foremost (this includes the Dublin
Core metadata and other specific metadata). As
for the content, there are some extra information
added such as the format type, file size, created
date, version etc. Besides the original format,
one has to know the kinds of format that can be
supported in the future. When the required format
is confirmed, the original resource is converted
into that format. The format conversion function
can be added to the content component manu-
ally if an automatic conversion module does not
exist. The annotation to a digital resource may
not be corresponding to a record in the Metadata
component. The relationships between them are
shown in Figure 3. The relationships between ID
component and other four components are 1:N.
And the relationship between Metadata component
and Content component is 1:N. However, at some
time, to improve the efficiency of the applications,
the content can be retrieved directly without ac-
cessing the ID component.

After analyzing the properties and functions
of a digital resource, the next step is to create a
management system for it. There are several
methods for the administrator to create the system.
One method is to create it through the use of our
assistant tool that can generate the source code
and distribution package, given the analysis of
the digital resource from the above sections. Once
complete, it is possible to set up a standalone
system to manage the digital resources as described
in section 6.
A second method to create a management sys-
tem is to use the atomic components available on
the Internet. Again,our assistant tool can also help
users generate the corresponding source code and
distribution packages. within comparison to the
first method, the set-up and operation cost of the
second method is much less. The administrator
only needs to install a small system without any
locally stored data.
The third method is to create the digital
resource component directly on the Web. The
administrator inputs the specific information