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Persistent Digital Archives and Library System (PeDALS). Dennis Bitterlich, Electronic Records Archivist. What is PeDALS? .

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Persistent digital archives and library system pedals l.jpg

Persistent Digital Archives and Library System (PeDALS)

Dennis Bitterlich, Electronic Records Archivist


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What is PeDALS?

  • A grant funded multi-state project financed by the Library of Congress (National Digital Information Infrastructure & Preservation Program (NDIIPP)) and the Institute for Museum and Library Services

  • Includes five state partners: Arizona, Florida, New York, South Carolina and Wisconsin, with Arizona as the lead partner

  • Project will run 18-months, until the middle of 2009; if successful, WHS intends to continue participation beyond this period

  • At the end of the project each partner will have a functioning electronic records repository


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Why is PeDALS Needed?

  • An increasing number of state government records of long-term value are created in electronic-only format

  • Due to the large and increasing volume of electronic records in varied formats, traditional appraisal and acquisition practices are no longer effective—an automated, rules-based system like PeDALS is one possible response to this new reality

  • PeDALS is not an electronic records management system, but rather a way to acquire electronic records already scheduled for transfer

  • PeDALS is both a learning opportunity and a chance to implement a functioning system


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Goals of the Project

  • Develop a methodology to support an automated, integrated workflow to process collections of electronic records

  • Implement an inexpensive storage system that can preserve the integrity and authenticity of electronic records over time

  • Remove barriers to adoption by keeping costs of the system as low as possible

  • Work with Wisconsin Document Depository Program to develop ways to integrate digital format state agency publications into PeDALS processes; since 2005 the Depository has worked to preserve e-publications acquired from state websites



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Submission Information Package (SIP) ArchitectureArchival Information Package (AIP)

  • SIP: Agency records with associated metadata are transferred to the PeDALS system

  • Initial checks for authenticity, integrity, restrictions, and any viruses or malware

  • AIP: Rules-based software will transform records into format for long-term storage


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Lots of Copies Keeps Stuff Safe (LOCKSS) Architecturehttp://www.lockss.org/lockss/Home

  • Records are transferred into LOCKSS servers for long-term preservation

  • LOCKSS is a data storage system that scans for and repairs file corruption and other data integrity problems

  • Hardened firewalls and geographic distribution provides added security


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Dissemination Information Package (DIP) Architecture

  • Web server will provide Internet access to records through a web-based search interface

  • Access to records restricted by statute or otherwise will be blocked during restriction period

  • Records scheduled for transfer, but not access, are held in the electronic archive, but no user copy is sent to the web server until public access is allowed


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Microsoft BizTalk Overview Architecture

BizTalk is a middleware application which at its core is an XML Message Queue which will:

Receive Objects → Converts & Performs Logic on Objects → Send Objects

Completed by BizTalk using XML


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BizTalk Pipelines Architecture

Pipelines

  • Connections between systems

    • Connect BizTalk to databases

    • Connect BizTalk to web

    • Connect BizTalk to file servers

    • Connect BizTalk to programs


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BizTalk Business Rules Architecture

Business rules

  • BizTalk speak for high level processes that determine what orchestrations will be performed

    • If record series confidential or restricted then go to orchestration to populate restrictions


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BizTalk Orchestrations Architecture

Orchestrations

  • BizTalk speak for the logic to process objects

    • Build in logic to calculate length of restrictions and database fields to populate


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Initial BizTalk Development Goals & Objectives Architecture

1 – Write ARCAT BizTalk Code pipeline

  • Series already cataloged

  • Reduced duplication of work & manual data entry

  • Pipeline will work for CGI/BIN Web Service

  • Copy programming code to create next pipelines

    2 – Write Web Services BizTalk Code pipeline

  • Copied from CGI/BIN ARCAT Service pipeline

  • Generic HTTP pipeline to Agencies Web Pages

  • Can use for PeDALS “Drop Box”


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Initial BizTalk Development Goals & Objectives Architecture

3 – Write DHS BizTalk Code pipeline

  • Code copied from prior pipelines

  • Connect to a database

  • Solve issues related to external networks

    4 – Write DWD BizTalk Code pipeline

  • Connect to a file server

  • Issues related to external networks should be solved, but may be different for file server connection


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Initial BizTalk Development Goals & Objectives Architecture

5 – Write Call JHOVE, MetaExtractor, or C# Code in BizTalk to wrap records with preservation metadata orchestration

  • Once we can receive records through pipelines

  • Create logic to perform in BizTalk

  • Wrap records in XML in preservation metadata

  • First, execute a third party open source program such as JHOVE or MetaExtractor

  • Second, write code to interact with software programming languages such as C#


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Measurement of Success Architecture

1 – Ability to extract MARC records from ARCAT and insert into database

2 – Ability to create external web services pipeline to transfer records to WHS

3 – Ability to create external file pipeline to DHS Quest Archives Manager to transfer records to WHS

4 – Ability to create external file pipeline to DWD to transfer records to WHS

5 – Ability to wrap electronic records with preservation metadata inside of BizTalk


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Process to Write Code Architecture

Iterative Process to:

1) Write BizTalk programming code

2) Test BizTalk programming code

3) Revise BizTalk programming code

4) Retest BizTalk programming code


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Questions? Architecture

Dennis Bitterlich, Electronic Records Archivist

[email protected]


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