The portal framework fundamentally changes how information systems are built,
designed, and implemented. Reuse is imperative when new technologies like SOA enable
the asset-based environment.
The.Traditional.Repository.
The traditional repository (Figure 6, label #2) is similar to the traditional data warehouse,
only extended to the entire inventory of assets. The collection image describes the various
methods of grouping assets. Grouping assets into collections is a natural activity that has
been done ever since the computer was created. Four basic collection schemes can be defined:
classification, assimilation, semantic, and activity-based. The classification relationship is
a basic domain-based relationship. For example, all ???.xls??? files on a personal computer
are related by the classification that they are Excel files. Suppose the content classification
scheme contains categories customer, product, order, billing, and finance. The librarian can
classify entities in the customer classification taxonomy, irregardless of the originating logical
model. The most obvious relationship between assets is the assimilation relationship,
which basically states that one asset is directly, systematically, and purposefully related to
another.
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