4.2.2.1 Information Package

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The conceptual structure for supporting Long Term Preservation of information is the Information Package. An Information Package is a container that contains two types of Information Objects, the Content Information and the Preservation Description Information (PDI); the Information Package can be associated with two other types of Information Objects, Packaging Information and Package Descriptions. There are several types of Information Packages that are used within the archival process. These Information Packages may be used to structure and store the OAIS holdings; to transport the required information from the Producer to the OAIS, or to transport requested information between the OAIS and Consumers. There are differing information requirements for each of these functions. The UML diagram in figure 4-13 illustrates the conceptual view of an Information Package. This UML diagram shows that an Information Package contains zero or one Content Information objects, zero or more PDI objects, and is associated with exactly one piece of Packaging Information, which identifies and delimits the Information Package. The Information Package is also associated with one or more Package Descriptions that describe the Content Object to enable efficient access.

Figure 4-13 Information Package Contents 650x0m2.jpg

Figure 4-13: Information Package Contents

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