4.2 INFORMATION MODEL - Revision history

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 This subsection builds on the concepts presented in section 2 to further describe the types of information that are exchanged and managed within the OAIS. This subsection also defines the specific Information Objects that are used within the OAIS to preserve and access the information entrusted to the Archive. This more detailed model of OAIS-related Information Objects is intended to aid the architect or designer of future OAIS systems. The objects discussed in this subsection are conceptual and should not be taken to imply any specific implementations.
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 ****[[4.2.2.8 Collection Descriptions]]
 ***[[4.2.3 DATA MANAGEMENT INFORMATION]]

Hlhours at 14:36, 13 August 2015

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← Older revision		Revision as of 14:36, 13 August 2015
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	4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION		***4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION
			****[[4.2.1.1 Information Object]]
	4.2.1.1 Information Object		****[[4.2.1.2 Data Object]]
			****[[4.2.1.3 Representation Information]]
	4.2.1.2 Data Object		*****[[4.2.1.3.1 Representation Information Types]]
			*****[[4.2.1.3.2 Representation Networks]]
	4.2.1.3 Representation Information		****[[4.2.1.4 Taxonomy of Information Object Classes Used by OAIS]]
			*****[[4.2.1.4.1 Content Information]]
	4.2.1.3.1 Representation Information Types		*****[[4.2.1.4.2 Preservation Description Information]]
			*****[[4.2.1.4.3 Packaging Information]]
	4.2.1.3.2 Representation Networks		*****[[4.2.1.4.4 Descriptive Information]]
			***[[4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)]]
	4.2.1.4 Taxonomy of Information Object Classes Used by OAIS		****[[4.2.2.1 Information Package]]
			****[[4.2.2.2 Types of Information Packages]]
	4.2.1.4.1 Content Information		****[[4.2.2.3 The Archival Information Package]]
			****[[4.2.2.4 Specialization of the AIP and Package Descriptions]]
	4.2.1.4.2 Preservation Description Information		****[[4.2.2.5 Archival Information Unit]]
			****[[4.2.2.6 Unit Description]]
	4.2.1.4.3 Packaging Information		****[[4.2.2.7 Archival Information Collections]]
			****[[4.2.2.8 Collection Descriptions]]
	4.2.1.4.4 Descriptive Information		***[[4.2.3 DATA MANAGEMENT INFORMATION]]

	4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)

	4.2.2.1 Information Package

	4.2.2.2 Types of Information Packages

	4.2.2.3 The Archival Information Package

	4.2.2.4 Specialization of the AIP and Package Descriptions

	4.2.2.5 Archival Information Unit

	4.2.2.6 Unit Description

	4.2.2.7 Archival Information Collections

	4.2.2.8 Collection Descriptions

	4.2.3 DATA MANAGEMENT INFORMATION

Hlhours at 13:15, 13 August 2015

2015-08-13T13:15:06Z

← Older revision		Revision as of 13:15, 13 August 2015
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	4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION		4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION
	4.2.1.1 Information Object
	4.2.1.2 Data Object		4.2.1.1 Information Object
	4.2.1.3 Representation Information
	4.2.1.3.1 Representation Information Types		4.2.1.2 Data Object
	4.2.1.3.2 Representation Networks
			4.2.1.3 Representation Information

			4.2.1.3.1 Representation Information Types

			4.2.1.3.2 Representation Networks

	4.2.1.4 Taxonomy of Information Object Classes Used by OAIS		4.2.1.4 Taxonomy of Information Object Classes Used by OAIS

	4.2.1.4.1 Content Information		4.2.1.4.1 Content Information

	4.2.1.4.2 Preservation Description Information		4.2.1.4.2 Preservation Description Information

	4.2.1.4.3 Packaging Information		4.2.1.4.3 Packaging Information

	4.2.1.4.4 Descriptive Information		4.2.1.4.4 Descriptive Information

	4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)		4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)

	4.2.2.1 Information Package		4.2.2.1 Information Package

	4.2.2.2 Types of Information Packages		4.2.2.2 Types of Information Packages

	4.2.2.3 The Archival Information Package		4.2.2.3 The Archival Information Package

	4.2.2.4 Specialization of the AIP and Package Descriptions		4.2.2.4 Specialization of the AIP and Package Descriptions

	4.2.2.5 Archival Information Unit		4.2.2.5 Archival Information Unit

	4.2.2.6 Unit Description		4.2.2.6 Unit Description

	4.2.2.7 Archival Information Collections		4.2.2.7 Archival Information Collections

	4.2.2.8 Collection Descriptions		4.2.2.8 Collection Descriptions

	4.2.3 DATA MANAGEMENT INFORMATION		4.2.3 DATA MANAGEMENT INFORMATION

Hlhours at 13:13, 13 August 2015

2015-08-13T13:13:56Z

← Older revision		Revision as of 13:13, 13 August 2015
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	Subsection 4.2.1 provides a model of the information required for effective Long Term Preservation of information. Subsection 4.2.2 describes the conceptual objects and containers that represent the contents of an OAIS.		Subsection 4.2.1 provides a model of the information required for effective Long Term Preservation of information. Subsection 4.2.2 describes the conceptual objects and containers that represent the contents of an OAIS.

	4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION
			4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION
	4.2.1.1 Information Object		4.2.1.1 Information Object
			4.2.1.2 Data Object
	4.2.1.2 Data Object		4.2.1.3 Representation Information
			4.2.1.3.1 Representation Information Types
	4.2.1.3 Representation Information		4.2.1.3.2 Representation Networks
			4.2.1.4 Taxonomy of Information Object Classes Used by OAIS
	4.2.1.3.1 Representation Information Types		4.2.1.4.1 Content Information
			4.2.1.4.2 Preservation Description Information
	4.2.1.3.2 Representation Networks		4.2.1.4.3 Packaging Information
			4.2.1.4.4 Descriptive Information
	4.2.1.4 Taxonomy of Information Object Classes Used by OAIS		4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)
			4.2.2.1 Information Package
	4.2.1.4.1 Content Information		4.2.2.2 Types of Information Packages
			4.2.2.3 The Archival Information Package
	4.2.1.4.2 Preservation Description Information		4.2.2.4 Specialization of the AIP and Package Descriptions
			4.2.2.5 Archival Information Unit
	4.2.1.4.3 Packaging Information		4.2.2.6 Unit Description
			4.2.2.7 Archival Information Collections
	4.2.1.4.4 Descriptive Information		4.2.2.8 Collection Descriptions
			4.2.3 DATA MANAGEMENT INFORMATION
	4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)

	4.2.2.1 Information Package

	4.2.2.2 Types of Information Packages

	4.2.2.3 The Archival Information Package

	4.2.2.4 Specialization of the AIP and Package Descriptions

	4.2.2.5 Archival Information Unit

	4.2.2.6 Unit Description

	4.2.2.7 Archival Information Collections

	4.2.2.8 Collection Descriptions

	4.2.3 DATA MANAGEMENT INFORMATION

Hlhours at 13:12, 13 August 2015

2015-08-13T13:12:58Z

Hlhours at 13:12, 13 August 2015

2015-08-13T13:12:01Z

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Hlhours at 11:48, 13 August 2015

2015-08-13T11:48:53Z

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	==		== 4.2.2.6 Unit Description ==
	4.2.2.6 Unit Description ==

Hlhours at 11:47, 13 August 2015

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	4.2.2.1 Information Package
			== 4.2.2.1 Information Package ==


	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.		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.
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	An Archival Information Package (AIP), which is modeled in figure 4-15, is a specialization of the Information Package. The AIP is defined to provide a concise way of referring to a set of information that has, in principle, all the qualities needed for permanent, or indefinite, Long Term Preservation of a designated Information Object. The AIP is itself an Information Object that is a container of other Information Objects. Within the AIP is the designated Information Object, and it is called the Content Information.		An Archival Information Package (AIP), which is modeled in figure 4-15, is a specialization of the Information Package. The AIP is defined to provide a concise way of referring to a set of information that has, in principle, all the qualities needed for permanent, or indefinite, Long Term Preservation of a designated Information Object. The AIP is itself an Information Object that is a container of other Information Objects. Within the AIP is the designated Information Object, and it is called the Content Information.
	'''Figure 4-15: Archival Information Package (AIP)		'''Figure 4-15: Archival Information Package (AIP)'''
	'''

	Also within the AIP is an Information Object called the Preservation Description Information (PDI). The PDI contains additional information about the Content Information and is needed to make the Content Information meaningful for the indefinite Long Term.		Also within the AIP is an Information Object called the Preservation Description Information (PDI). The PDI contains additional information about the Content Information and is needed to make the Content Information meaningful for the indefinite Long Term.
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	There are two specializations of the Package Description, the Unit Description and the Collection Description. Figure 4-20 is a UML diagram illustrating this specialization. The difference in these two classes is based on the functionality needed to effectively access the contents of an AIU versus the functionality needed to effectively access AIPs that are contained in an AIC.		There are two specializations of the Package Description, the Unit Description and the Collection Description. Figure 4-20 is a UML diagram illustrating this specialization. The difference in these two classes is based on the functionality needed to effectively access the contents of an AIU versus the functionality needed to effectively access AIPs that are contained in an AIC.
	'''		'''Figure 4-20: Archival Specialization of the Package'''
	Figure 4-20: Archival Specialization of the Package'''

	To aid in the understanding of these constructs, the next two subsections of this document will use an example of a company setting up an OAIS of digital versions of movies. This example will focus on the information content of constructs in an AIP. Subsection 4.3 illustrates more of the details of the information transformations and data flows in an OAIS.		To aid in the understanding of these constructs, the next two subsections of this document will use an example of a company setting up an OAIS of digital versions of movies. This example will focus on the information content of constructs in an AIP. Subsection 4.3 illustrates more of the details of the information transformations and data flows in an OAIS.

Hlhours at 13:35, 12 August 2015

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	== 4.2.1.3 Representation Information		== 4.2.1.3 Representation Information ==
	==

	The Representation Information accompanying a digital object, or sequence of bits, is used to provide additional meaning. It typically maps the bits into commonly recognized data types such as character, integer, and real and into groups of these data types. It associates these with higher-level meanings: this includes the description of the, possibly complex, ways objects are interrelated (for example, Representation Information could indicate that three numbers represent temperature, latitude and longitude; and they are expressed in degrees Celsius and angular degrees; and they are interrelated in that the temperature is measured at the specified longitude/latitude).		The Representation Information accompanying a digital object, or sequence of bits, is used to provide additional meaning. It typically maps the bits into commonly recognized data types such as character, integer, and real and into groups of these data types. It associates these with higher-level meanings: this includes the description of the, possibly complex, ways objects are interrelated (for example, Representation Information could indicate that three numbers represent temperature, latitude and longitude; and they are expressed in degrees Celsius and angular degrees; and they are interrelated in that the temperature is measured at the specified longitude/latitude).

Hlhours: Created page with "This subsection builds on the concepts presented in section 2 to further describe the types of information that are exchanged and managed within the OAIS. This subsection also..."

2015-08-12T13:34:48Z

Created page with "This subsection builds on the concepts presented in section 2 to further describe the types of information that are exchanged and managed within the OAIS. This subsection also..."

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← Older revision		Revision as of 13:12, 13 August 2015
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	Subsection 4.2.1 provides a model of the information required for effective Long Term Preservation of information. Subsection 4.2.2 describes the conceptual objects and containers that represent the contents of an OAIS.		Subsection 4.2.1 provides a model of the information required for effective Long Term Preservation of information. Subsection 4.2.2 describes the conceptual objects and containers that represent the contents of an OAIS.

	4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION		4.2.1 LOGICAL MODEL FOR ARCHIVAL INFORMATION

	4.2.1.1 Information Object		4.2.1.1 Information Object

	4.2.1.2 Data Object		4.2.1.2 Data Object

	4.2.1.3 Representation Information		4.2.1.3 Representation Information

	4.2.1.3.1 Representation Information Types		4.2.1.3.1 Representation Information Types

	4.2.1.3.2 Representation Networks		4.2.1.3.2 Representation Networks

	4.2.1.4 Taxonomy of Information Object Classes Used by OAIS		4.2.1.4 Taxonomy of Information Object Classes Used by OAIS

	4.2.1.4.1 Content Information		4.2.1.4.1 Content Information

	4.2.1.4.2 Preservation Description Information		4.2.1.4.2 Preservation Description Information

	4.2.1.4.3 Packaging Information		4.2.1.4.3 Packaging Information

	4.2.1.4.4 Descriptive Information		4.2.1.4.4 Descriptive Information

	4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)		4.2.2 LOGICAL MODEL OF INFORMATION IN AN OPEN ARCHIVAL INFORMATION SYSTEM (OAIS)

	4.2.2.1 Information Package		4.2.2.1 Information Package

	4.2.2.2 Types of Information Packages		4.2.2.2 Types of Information Packages

	4.2.2.3 The Archival Information Package		4.2.2.3 The Archival Information Package

	4.2.2.4 Specialization of the AIP and Package Descriptions		4.2.2.4 Specialization of the AIP and Package Descriptions

	4.2.2.5 Archival Information Unit		4.2.2.5 Archival Information Unit

	4.2.2.6 Unit Description		4.2.2.6 Unit Description

	4.2.2.7 Archival Information Collections		4.2.2.7 Archival Information Collections

	4.2.2.8 Collection Descriptions		4.2.2.8 Collection Descriptions

	4.2.3 DATA MANAGEMENT INFORMATION		4.2.3 DATA MANAGEMENT INFORMATION