premis what is premis? – preservation metadata implementation strategies when is premis use? –...
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PREMIS
• What is PREMIS? – Preservation Metadata Implementation Strategies
• When is PREMIS use?– PREMIS is used for “repository design, evaluation, and
archived information packaged among preservation repositories”
• How is PREMIS use?– PREMIS Data Dictionary provides guidelines regarding
“the information a repository uses to support the digital preservation process”
• What is PREMIS? – Preservation Metadata Implementation Strategies
• When is PREMIS use?– PREMIS is used for “repository design, evaluation, and
archived information packaged among preservation repositories”
• How is PREMIS use?– PREMIS Data Dictionary provides guidelines regarding
“the information a repository uses to support the digital preservation process”
PREMIS
• What is “preservation metadata” referring to?– “It is information that supports and documents the digital
preservation process”. Which includes information such as:• Provenance – refers to who has ownership of the digital
object• Authenticity – refers to the claim of the digital object• Preservation activity – refers to the activities that have been
carried out to preserve the digital object• Technical environment – refers to the tasks required to
interpret and use the digital object • Rights management – refers the intellectual property rights
that must be declared
• What is “preservation metadata” referring to?– “It is information that supports and documents the digital
preservation process”. Which includes information such as:• Provenance – refers to who has ownership of the digital
object• Authenticity – refers to the claim of the digital object• Preservation activity – refers to the activities that have been
carried out to preserve the digital object• Technical environment – refers to the tasks required to
interpret and use the digital object • Rights management – refers the intellectual property rights
that must be declared
PREMIS Data Dictionary
• Conventions– Semantic units : refers to a piece of information or
knowledge• Example: objectIdentifer under the <object>
– Containers: refers to a xml tag that have no value rather serve to group related semantic units
– Subunits: refers to the units held within a container– Extension containers: are containers that are
designed to give a place for non-PREMIS metadata
• Conventions– Semantic units : refers to a piece of information or
knowledge• Example: objectIdentifer under the <object>
– Containers: refers to a xml tag that have no value rather serve to group related semantic units
– Subunits: refers to the units held within a container– Extension containers: are containers that are
designed to give a place for non-PREMIS metadata
PREMIS Data Model
PREMIS Data Model
• Intellectual Entity – refer to content that can be describe as a unit (e.g. books, maps, articles)
• Intellectual Entity – refer to content that can be describe as a unit (e.g. books, maps, articles)
PREMIS Data Model
• Objects – refer to units of information in digital form. PREMIS defines different kinds of objects it can an a file, bitstream or representation
• File – it is a computer file, such as a pdf, txt or JPEG
• Bitstream – refer to data bits within a file that contain common properties for preservation purposes
• Objects – refer to units of information in digital form. PREMIS defines different kinds of objects it can an a file, bitstream or representation
• File – it is a computer file, such as a pdf, txt or JPEG
• Bitstream – refer to data bits within a file that contain common properties for preservation purposes
PREMIS Data Model
• Representation – refer to a set of files, that includes structural metadata, required to be identified, stored and maintained in order to assemble a complete rendition of an Intellectual unit. – For example, text files and images files of a
magazine are required to form a representation.
• Representation – refer to a set of files, that includes structural metadata, required to be identified, stored and maintained in order to assemble a complete rendition of an Intellectual unit. – For example, text files and images files of a
magazine are required to form a representation.
PREMIS Data Model• Sample syntax
<object> </object>• The units of information that can be recorded includes:
– Type of object (file, bitstream, or representation)– A unique identifier for the object (type and value)
• For example,<object xsi:type="representation">
<objectIdentifier><objectIdentifierType>FDsys ACP</objectIdentifierType>
<objectIdentifierValue>R0b002ee180b003b0</objectIdentifierValue></objectIdentifier>
</object>
This particular segment states that this object is a representation (that is a set of files, this representation has a unique identifier)
• Sample syntax<object> </object>
• The units of information that can be recorded includes:– Type of object (file, bitstream, or representation)– A unique identifier for the object (type and value)
• For example,<object xsi:type="representation">
<objectIdentifier><objectIdentifierType>FDsys ACP</objectIdentifierType>
<objectIdentifierValue>R0b002ee180b003b0</objectIdentifierValue></objectIdentifier>
</object>
This particular segment states that this object is a representation (that is a set of files, this representation has a unique identifier)
PREMIS Object Example• Other units of information that can be recorded includes:
– “Information indicating the policy on the set of preservation functions to be applied to an object”
<object xsi:type="file"><objectIdentifier>
<objectIdentifierType>FDsys ACP</objectIdentifierType>
<objectIdentifierValue>D09002ee180b003a9</objectIdentifierValue> </objectIdentifier>
<preservationLevel> <preservationLevelValue>full</preservationLevelValue> </preservationLevel>
• Other units of information that can be recorded includes:– “Information indicating the policy on the set of preservation functions to
be applied to an object”
<object xsi:type="file"><objectIdentifier>
<objectIdentifierType>FDsys ACP</objectIdentifierType>
<objectIdentifierValue>D09002ee180b003a9</objectIdentifierValue> </objectIdentifier>
<preservationLevel> <preservationLevelValue>full</preservationLevelValue> </preservationLevel>
PREMIS Object Example
• Other units of information that can be recorded includes:– Information indicating if the object is subject to one or
more processes of decoding or unbundling– information used to verify if an object has been changed in
an undocumented or unauthorized way– The size of the object– The format of the object
• For example
• Other units of information that can be recorded includes:– Information indicating if the object is subject to one or
more processes of decoding or unbundling– information used to verify if an object has been changed in
an undocumented or unauthorized way– The size of the object– The format of the object
• For example
PREMIS Object Example<objectCharacteristics> <compositionLevel>0</compositionLevel> <fixity> <messageDigestAlgorithm>SHA-256</messageDigestAlgorithm>
<messageDigest>4977070b92f0bb2642c6be368ad68a8d1d1c5dbbb3310544db781f56a860b0a1</messageDigest> <messageDigestOriginator>FDsys</messageDigestOriginator> </fixity> <size>9326</size> <format> <formatDesignation> <formatName>text/plain</formatName> </formatDesignation>
<formatRegistry> <formatRegistryName>PRONOM</formatRegistryName> <formatRegistryKey>x-fmt/111</formatRegistryKey> </formatRegistry> <formatNote>Plain Text File</formatNote> </format> </objectCharacteristics>
<objectCharacteristics> <compositionLevel>0</compositionLevel> <fixity> <messageDigestAlgorithm>SHA-256</messageDigestAlgorithm>
<messageDigest>4977070b92f0bb2642c6be368ad68a8d1d1c5dbbb3310544db781f56a860b0a1</messageDigest> <messageDigestOriginator>FDsys</messageDigestOriginator> </fixity> <size>9326</size> <format> <formatDesignation> <formatName>text/plain</formatName> </formatDesignation>
<formatRegistry> <formatRegistryName>PRONOM</formatRegistryName> <formatRegistryKey>x-fmt/111</formatRegistryKey> </formatRegistry> <formatNote>Plain Text File</formatNote> </format> </objectCharacteristics>
PREMIS Object Example
• Other units of information that can be recorded includes:– The original name of the object (prior to being named by
the repository)– Information about where and how a files are stored in the
repository– A categorization of the nature of the relationship (for
instance, “structural” is a relationship between parts of an object)
• Other units of information that can be recorded includes:– The original name of the object (prior to being named by
the repository)– Information about where and how a files are stored in the
repository– A categorization of the nature of the relationship (for
instance, “structural” is a relationship between parts of an object)
PREMIS Object Example<originalName>S3880IS.txt</originalName>
<storage><contentLocation>
<contentLocationType>URI</contentLocationType> <contentLocationValue>file:/u02/app/emc/documentum/data/fdsysprod1/fdsysprod1/
content_storage_01/00002ee1/80/55/b0/48.txt</contentLocationValue> </contentLocation> <storageMedium>hard disk</storageMedium> </storage> <relationship> <relationshipType>structural</relationshipType> <relationshipSubType>is part of</relationshipSubType>
<relatedObjectIdentification> <relatedObjectIdentifierType>FDsys ACP</relatedObjectIdentifierType> <relatedObjectIdentifierValue>R0b002ee180b003b0</relatedObjectIdentifierValue> </relatedObjectIdentification> </relationship></object>
<originalName>S3880IS.txt</originalName> <storage>
<contentLocation> <contentLocationType>URI</contentLocationType> <contentLocationValue>file:/u02/app/emc/documentum/data/fdsysprod1/fdsysprod1/
content_storage_01/00002ee1/80/55/b0/48.txt</contentLocationValue> </contentLocation> <storageMedium>hard disk</storageMedium> </storage> <relationship> <relationshipType>structural</relationshipType> <relationshipSubType>is part of</relationshipSubType>
<relatedObjectIdentification> <relatedObjectIdentifierType>FDsys ACP</relatedObjectIdentifierType> <relatedObjectIdentifierValue>R0b002ee180b003b0</relatedObjectIdentifierValue> </relatedObjectIdentification> </relationship></object>
PREMIS Data Model
• Events – refers to actions that involve an object and an agent known to the system– Events are critical for maintaining the digital provenance of an
object (helps demonstrates the authenticity of the object)• Examples of Events:
– modifying an document– actions that create new relationships
• Object could be related to another object as a result of a particular event, for instance if a program takes file 1 and generates a different version known as file 2
– Actions that check the validity and integrity of the objects (i.e. virus scan)
• Events – refers to actions that involve an object and an agent known to the system– Events are critical for maintaining the digital provenance of an
object (helps demonstrates the authenticity of the object)• Examples of Events:
– modifying an document– actions that create new relationships
• Object could be related to another object as a result of a particular event, for instance if a program takes file 1 and generates a different version known as file 2
– Actions that check the validity and integrity of the objects (i.e. virus scan)
PREMIS Data Model
• Sample syntax <event> </event>• The information that can be recorded under event includes:
– A unique identifier for the event– Date, time and type of event– Detail description of the event– The outcome of the event– Objects and agents involved in the event and their specific
roles • Agents role are defined here because agents can perform
different roles in different events
• Sample syntax <event> </event>• The information that can be recorded under event includes:
– A unique identifier for the event– Date, time and type of event– Detail description of the event– The outcome of the event– Objects and agents involved in the event and their specific
roles • Agents role are defined here because agents can perform
different roles in different events
PREMIS Event Example<event>
<eventIdentifier> <eventIdentifierType>FDsys:event</eventIdentifierType> <eventIdentifierValue>1cdd2b6c-5a2d-449b-b386-ebb15eb4af11</eventIdentifierValue> </eventIdentifier> <eventType>Rendition Submitted</eventType> <eventDateTime>2010-10-06T19:38:47-04:00</eventDateTime> <eventDetail>Rendition R0b002ee180b003b0, uploaded by hotfolderadmin, was submitted in the Submission Information package
P0b002ee180b003af</eventDetail> <eventOutcomeInformation>
<eventOutcome>Success</eventOutcome> </eventOutcomeInformation>
<linkingAgentIdentifier> <linkingAgentIdentifierType>FDsys:agent</linkingAgentIdentifierType> <linkingAgentIdentifierValue>hotfolderadmin</linkingAgentIdentifierValue> <linkingAgentRole>implementer</linkingAgentRole> </linkingAgentIdentifier>
<linkingObjectIdentifier> <linkingObjectIdentifierType>FDsys</linkingObjectIdentifierType> <linkingObjectIdentifierValue>R0b002ee180b003b0</linkingObjectIdentifierValue> <linkingObjectRole>outcome</linkingObjectRole> </linkingObjectIdentifier></event>
<event><eventIdentifier>
<eventIdentifierType>FDsys:event</eventIdentifierType> <eventIdentifierValue>1cdd2b6c-5a2d-449b-b386-ebb15eb4af11</eventIdentifierValue> </eventIdentifier> <eventType>Rendition Submitted</eventType> <eventDateTime>2010-10-06T19:38:47-04:00</eventDateTime> <eventDetail>Rendition R0b002ee180b003b0, uploaded by hotfolderadmin, was submitted in the Submission Information package
P0b002ee180b003af</eventDetail> <eventOutcomeInformation>
<eventOutcome>Success</eventOutcome> </eventOutcomeInformation>
<linkingAgentIdentifier> <linkingAgentIdentifierType>FDsys:agent</linkingAgentIdentifierType> <linkingAgentIdentifierValue>hotfolderadmin</linkingAgentIdentifierValue> <linkingAgentRole>implementer</linkingAgentRole> </linkingAgentIdentifier>
<linkingObjectIdentifier> <linkingObjectIdentifierType>FDsys</linkingObjectIdentifierType> <linkingObjectIdentifierValue>R0b002ee180b003b0</linkingObjectIdentifierValue> <linkingObjectRole>outcome</linkingObjectRole> </linkingObjectIdentifier></event>
PREMIS Data Model
• Agents – refer to people, organizations, or software associated with events, more specifically preservation events, of an object– In the data model diagram, there is no arrow from
Agent entity to the Object entity, that is because Agents influence Objects indirectly through Events.
• Agents – refer to people, organizations, or software associated with events, more specifically preservation events, of an object– In the data model diagram, there is no arrow from
Agent entity to the Object entity, that is because Agents influence Objects indirectly through Events.
PREMIS Data Model
• Sample syntax<agent> </agent>
• The information that can be recorded under agent includes:– A unique identifier for the agent– The agent’s name– The type of agent (people, organization or
software)
• Sample syntax<agent> </agent>
• The information that can be recorded under agent includes:– A unique identifier for the agent– The agent’s name– The type of agent (people, organization or
software)
PREMIS Agent Example<agent>
<agentIdentifier> <agentIdentifierType>FDsys:agent</agentIdentifierType> <agentIdentifierValue>hotfolderadmin</agentIdentifierValue> </agentIdentifier> <agentName>hotfolderadmin</agentName> <agentType>Person</agentType> </agent>
<agent><agentIdentifier>
<agentIdentifierType>FDsys:agent</agentIdentifierType> <agentIdentifierValue>hotfolderadmin</agentIdentifierValue> </agentIdentifier> <agentName>hotfolderadmin</agentName> <agentType>Person</agentType> </agent>
PREMIS Data Model
• Rights – refers to the rights and permission that are directly relevant to preserving objects
• Sample syntax<rights> </rights>
• The information that can be recorded under right includes:– A unique identifier for the rights statement– The action(s) that the rights statement allows– The object(s) to which the statement applies– The agents involved in the rights statements and their
roles
• Rights – refers to the rights and permission that are directly relevant to preserving objects
• Sample syntax<rights> </rights>
• The information that can be recorded under right includes:– A unique identifier for the rights statement– The action(s) that the rights statement allows– The object(s) to which the statement applies– The agents involved in the rights statements and their
roles
References
• http://www.loc.gov/standards/premis/understanding-premis.pdf
• http://www.oclc.org/research/activities/past/orprojects/pmwg/premis-final.pdf
• http://www.loc.gov/standards/premis/understanding-premis.pdf
• http://www.oclc.org/research/activities/past/orprojects/pmwg/premis-final.pdf