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Linked Digital Archive Institutional Repository Rathachai Chawuthai CSIM/SET/AIT
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OAIS PREMIS Digital Archive Institutional Repository 1 2 3 Fedora Challenges Share Reuse Link My Solution Related Works
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Institutional Repository & Digital Preservation PREMIS OAIS
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Institutional Repositories and Digital Preservation: Assessing Current Practices at Research Libraries Yuan Li Syracuse University yli115@syr.edu Meghan Banach University of Massachusetts Amherst mbanach@library.umass.edu
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Archive – Is a collection of historical records, or the physical place they are located. – contain primary source documents that have accumulated over the course of an individual or organization's lifetime, and are kept to show the function of an organization. Digital Archive – Is a digital format of archive that need to do digital preservation Digital Media Environment to render
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An Institutional Repository is an online locus for collecting, preserving, and disseminating - in digital form - the intellectual output of an institution, particularly a research institution. For a university, this would include materials such as research journal articles, before (preprints) and after (postprints) undergoing peer review, and digital versions of theses and dissertations, but it might also include other digital assets generated by normal academic life, such as administrative documents, course notes, or learning objects. The four main objectives for having an institutional repository are: – to provide open access to institutional research output by self-archiving it; – to create global visibility for an institution's scholarly research; – to collect content in a single location; – to store and preserve other institutional digital assets, including unpublished or otherwise easily lost ("grey") literature (e.g., theses or technical reports).
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Printed Age – Paper is durable format – Store under proper condition Digital Age – Information is fragile Technological obsolescence Deterioration of media
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Capacities v.s. Age 1000 Years 15 Years
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Do you have these?
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Preserve?
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Community – Manage & disseminate Digital Material created by institution and its community members Preservation – Loooooooooooooooooooooong-term
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Period Time Technology Change Infinity Short-term Medium-term Long-term
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Read Render Environment File Format Access Store Media Right & Agreement Security Search Migration Software Hardware ความ ถูกต้อง
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Using METADATA to describe preservation information
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Read Render Environment File Format Access Store Media Right & Agreement Security Search Migration Software Hardware
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Fit METADATA with digital archive requirement E.g.
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Implement Digital Archive in Institutional Repository Concern about Right & Agreement Have guidance of Digital Format preservation Have Content Policies by monitoring user activities or peer-review Plan for Long-term digital preservation Solve issue of lack of Preservation Funding
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PREMIS PRE servation M etadata: I mplement S trategies
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PREservation Metadata: Implementation Strategies Sponsor by Library of Congress (LOC) People usually refer to “PREMIS” as “Data Dictionary” Represent in XML format
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Metadata that supports activities intended to ensure the long-term usability of a digital resource Example – Store securely……… Nobody change ……… It needs metadata about Checksum – Can be read……… DVD, CD, Floppy Disk?, 5” Disk?, … – Can render……… Word 6?, Word 2003, Word 2010 …. ……… It needs metadata about app & version – Look originally……… Support changing source, how to render
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include information supports and document the digital preservation process and to include information that support the – Viability (survival) – Renderability (readable) – Understandability – Authenticity (correct) of the object over time.
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Common data model for organizing/thinking about preservation metadata Guidance for local implementations Standard for exchanging information packages between repositories
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Pieces of information or knowledge related to PREMIS entities that digital repository systems need to know and should be able to export to other systems More structure than normal METADATA
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May called “Bibliographic Entities” A set of content that is considered a single intellectual unit for purposes of management and description E.g. book, map, photograph, or database Intellectual Entities
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To be stored and managed in the preservation repository E.g. – Intellectual Entity : “Thailand Map” – Object Entity: Image file 3 Kinds of object – File A computer file, likes a PDF or JPEG – Representation Set of files that work together E.g. web page including, html, image, css, javascript – Bitstream A part of file E.g. a frame image in video file Object Entities
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Data Dictionary includes: – a unique identifier for the object (type and value), – fixity information such as a checksum (message digest) and the algorithm used to derive it, – the size of the object, – the format of the object, which can be specified directly or by linking to a format registry, – the original name of the object, – information about its creation, – information about inhibitors, – information about its significant properties, – information about its environment OS MacOS, Browser Safari – where and on what medium it is stored, – digital signature information, – relationships with other objects and other types of entities.
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Action that effect object in the repository – E.g. changing an object Data Dictionary includes: – a unique identifier for the event (type and value), – the type of event (creation, ingestion, migration, etc.), – the date and time the event occurred, – a detailed description of the event, – a coded outcome of the event, (Result of event; success | fail | …) – a more detailed description of the outcome, – agents involved in the event and their roles, – objects involved in the event and their roles. Events
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Actor, e.g. person, organization, or software Metadata standard, e.g. FOAF, vCARD, eduPerson, … Data Dictionary includes: – a unique identifier for the agent (type and value), – the agent's name, – designation of the type of agent (person, organization, software). Note: Agent can has many roles – Up to Event entities or Rights entities Agents
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Information about Rights and Permissions that are directly relevant to preserving objects in repository Assertion of Rights – To provide actionable info to preservation repository system Data Dictionary includes: – a unique identifier for the rights statement (type and value), – whether the basis for claiming the right is copyright, license or statute, – more detailed information about the copyright status, license terms, or statute, as applicable, – the action(s) that the rights statement allows, – any restrictions on the action(s), – the term of grant, or time period in which the statement applies, – the object(s) to which the statement applies, – agents involved in the rights statement and their roles. Rights
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OAIS O pen A rchival I nformation S ystem
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In 2000 the Research Libraries Group (RLG) and Online Computer Library Center (OCLC) discussed how both organizations build an infrastructure for purposes of archiving digital objects.
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Purpose – Model a system for archival information, which is represented in digital format, for long-term preservation Scope – Framework for long-term preservation and access – Terminology Architectures and Operation Preservation strategies and techniques Data model
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Primary functions – To preserve information over an extended period of time – To provide user access to the information in archives
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Person(s), or client systems, who provide the information to be preserved Person(s) who set the overall policy of the OAIS. Management is separate from administrative functions Person(s) who set the overall policy of the OAIS. Management is separate from administrative functions Person(s), or client systems who interact with the OAIS system and services
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Content Information Content Information PDI Preservation Description Information PDI Preservation Description Information Archive Packaging Information Descriptive Information about Package 1 Descriptive Information about Package 1 Package 1 Content Information: – Original targeted for preservation. – Physical/Digital object and it Representation Information.
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Preservation Description Information (PDI): – What is needed to preserve the Content Information Provenance – For reliability – Source of content – histories Context – Environment to render Reference – Refer to thing outside e.g. ISBN Fixity – Check sum, MD5, … Content Information Content Information PDI Preservation Description Information PDI Preservation Description Information Archive Packaging Information Descriptive Information about Package 1 Descriptive Information about Package 1 Package 1
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Descriptive Information: – information which is used to discover which package has the Content Information of interest – Full set of attributes that are searchable in catalog service Content Information Content Information PDI Preservation Description Information PDI Preservation Description Information Archive Packaging Information Descriptive Information about Package 1 Descriptive Information about Package 1 Package 1
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Submission Information Package (SIP) – Is sent to an OAIS by a Producer – Have some Content Information – Have some associated PDI Archival Information Packages (AIP) – Store in Archive Storage – Has transformed from one or more SIP – Has a complete set of PDI for the associated Content Information – Conform to OAIS internal standard – Is managed by OAIS Dissemination Information Package (DIP) – Present to Consumer – May not have complete PDI
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Accept SIPs from Producers – or from internal elements under Administration control Prepare the AIPs for archive storage
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Storage of AIP Maintenance of AIP Retrieval of AIPs.
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Populate – Descriptive Information – Administrative Data Maintain – Descriptive Information – Administrative Data Access – Descriptive Information – Administrative Data
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Solicit and negotiate submission agreement – With producer Audit submission – To ensure that they meet standard Maintain Configuration Management of – System hardware – Software Day-to-day governance of the other OAIS functional entities
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Monitor environment of OAIS Provide recommendations – Still accessible? – Long-term? – If original computing environment becomes obsolete?
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Determine – Existence – Description – Location – Availability Of information in OAIS Allow Consumer – Request – Retrieve Information of Products
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