PERICLES Building Digital Ecosystem Models - ‘Eye of the Storm: Preserving Digital Content in an...

GRANT AGREEMENT: 601138 | SCHEME FP7 ICT 2011.4.3 Promoting and Enhancing Reuse of Information throughout the Content Lifecycle taking account of Evolving Semantics [Digital Preservation]

“This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no601138”.

BUILDING DIGITAL ECOSYSTEM MODELSJohannes Biermann, Anna Eggers State and University Library Göttingen

Part A theory▶Digital Ecosystems

◦ Types of Change◦ Issues of Digital Ecosystems

▶Digital Ecosystem Model▶Modelling Strategies▶EcoBuilder▶Resulting ModelPart B building a model for a scenario

Agenda

interwoven evolving networks of ▶digital objects, ▶policies, ▶processes, ▶technical services,▶and user communitieswithin constantly changing and interacting environments influencing digital objects

Digital Ecosystems

Digital Ecosystem Example

Photo by Randy Montoya, CC BY-NC-ND 2.0, https://www.flickr.com/photos/sandialabs/6104342632/

▶creation, deletion and change of single entities▶change in larger social or cultural contexts▶merging and growing user communities

◦ changing expectations, requirements, and background knowledge of user communities

◦ exchange of digital objects▶new policies, processes▶technical infrastructure and dependency

changes

Planned and Unplanned Digital Ecosystem change

Complex evolving structures of Digital Ecosystems

Because of the complexity of DEs it hard to▶maintain them▶describe them▶introduce changes▶determine impact of change▶identify and resolve problems▶trace provenance

→ use of ontologies

Issues of Digital Ecosystems

▶Flexible formal data structure of knowledge▶Subject - Predicate - Object structure

◦ Leaf - is part of - a tree▶Reasoning to infer new information▶Ensure consistency of the domain

representation▶graph structure▶machine processable▶extendable

◦

Ontologies for handling this complexity

Modelling Strategies

Tool for the creation of Digital Ecosystem Models▶GUI & Java API▶Simplifies the creation of the model▶Usable by scenario experts without the

necessity to write ontology or Java sources▶Facilitates integration into workflows ▶Uses Java Jena API - can output

OWL/XML or Turtle

→ Will be used for the example

EcoBuilder

▶simulate impact of change▶reveal single point of failures▶use in a sheer curation scenario

◦ extraction of significant environment information

◦ automatic updating of models▶analyse provenance

Resulting Model

The DEM and the EcoBuilder are available on GitHub. (Apache v. 2 open source license)

https://github.com/pericles-project/DEMhttps://github.com/pericles-project/EcoBuilderhttp://pericles-project.eu/deliverables/75 http://pericles-project.eu/blog/post/EcoBuilder

Any Questions?

https://github.com/pericles-project/DEM

https://github.com/pericles-project/EcoBuilder

https://github.com/pericles-project/EcoBuilder

http://pericles-project.eu/deliverables/75

http://pericles-project.eu/blog/post/EcoBuilder

http://pericles-project.eu/blog/post/EcoBuilder

GRANT AGREEMENT: 601138 | SCHEME FP7 ICT 2011.4.3 Promoting and Enhancing Reuse of Information throughout the Content Lifecycle taking account of Evolving Semantics [Digital Preservation]

“This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no601138”.

PART B PRACTICEBUILDING A MODEL FOR SCENARIO

An artist produces videos and the produced videos are stored on a repository. The repository is owned by a museum. The videos are on display and played with a video player.

→ We will create this scenario with the EcoBuilder tool and extend it.

Scenario

Scenario - Basic DEM

ArtistHuman Agent

Video Production

Process

VideoFileDigital Object

RepositoryTechnical Service

MuseumUser

Community

Video PlaybackProcess

VideoPlayerHardware

Agent

executes

ownedByCommunity

storedOn

hasInput

manages

hasOutput

1. Add a backup backup process (Process) that runs On the repository

2. The backup process creates backups (Digital Object) of the video files. Use the hasInput and hasOutput relations of the Process entity.

Task 1 Adding Entities

Task 1 Solution

ArtistHuman Agent

VideoProductionProcess



MuseumUser Community

VideoPlaybackProcess

VideoPlayerHardware Agent

executes

ownedByCommunity

storedOn

hasInput

manages

hasOutput

BackupProcess

runsOn

RepositoryBackupDigital Object

hasOutput

3.Add a web interface (Service Interface) for browsing the repository and a User Community which uses the web interface. Use the relations providesAccessTo and isUsedBy.

Task 2 Technical Infrastructure

Task 2 SolutionArtist

Human Agent







executes

ownedByCommunity

storedOn

hasInput

manages

hasOutput

BackupProcess

runsOn

RepositoryBackupDigital Object

hasOutput

WebAccessService Interface

providesAccessToGeneralPublicUserCommunity

isUsedBy

4.Policies are implemented by Processes. Add a backup Policy and use the implementedBy relation to connect this policy to the backup process. Use the constraints relation from the policy to show which entities are constrained by this policy.

Task 3 Policies and Processes

Task 3 Solution

ArtistHuman Agent


Video FileDigital Object





executes

ownedByCommunity

storedOn

hasInputmanages

hasOutput

BackupProcess

runsOn

Repository Backup

Digital Object hasOutput

Web AccessService Interface


isUsedBy

BackupPolicyPolicy

constrains isImplementationOfconstrains

5.A Significance entity can have an assigned value to rank the level of significance. It is often linked to a Purpose entity, via the significantFor relation.

Rank entities which are significant for preservation purposes, e.g. the Video File is significant for Preservation.

Task 4 Policies and Processes

Task 5 Solution

ArtistHumanAgent







executes

ownedByCommunity

storedOn

hasInput

manages

hasOutput

BackupProcess

runsOn

Repository BackupDigital Object hasOutput

WebAccessService Interface


isUsedBy

BackupPolicyPolicy

constrainsPreservationSignificance

hasSignificance

isImplementationOfconstrains

6.Add a custom relation from the Museum to the Video File. It should express that the Museum buys the Video File.

Task 5 Custom templates

Task 5 Solution

ArtistHuman Agent

Video ProductionProcess

Video FileDigital Object



Video PlaybackProcess

Video PlayerHardware Agent

executes

ownedByCommunity

storedOn

hasInput

manages

hasOutput

BackupProcess

runsOn

Repository BackupDigital Object hasOutput

Web AccessService Interface


isUsedBy

BackupPolicyPolicy

constrainsPreservationSignificance

hasSignificance

buys

isImplementationOfconstrains

PERICLES Building Digital Ecosystem Models - ‘Eye of the Storm: Preserving Digital Content in an...

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