EventBased Model for Reconciling Digital Entities

1
Event-Based Model for Reconciling Digital Entities

• Ahmet Fatih Mustacoglu
• Ahmet E. Topcu
• Aurel Cami
• Geoffrey C. Fox
• Indiana University
• Computer Science Department
• Community Grids Laboratory
• amustaco_at_cs.indiana.edu
• http//www.cs.indiana.edu/amustaco
• May 23, 2007
• CTS-2007, Orlando, FL, U.S.A.

2
Outline

• Introduction
• Annotation Tools and Collaboration
• Motivation
• Prototype Semantic Research Grid (SRG) System
• SRG Key Concepts
• Research Issues
• SRG System Modules Overview
• Example Applications
• Conclusion

3
Annotation Tools and Collaboration

• Rapid development of tools and services aimed at
  fostering online collaboration and sharing
  between users and communities
• Social Bookmarking Tools supports annotation
  using keywords called tags and sharing
• e.g. del.icio.us
• Tools for annotation and sharing of scholarly
  publications
• Connotea
• Citeulike
• Bibsonomy
• Social Networking Tools(MySpace)
• Video Sharing and annotation
• e.g. YouTube

4
Typical User Library in Connotea
5
Motivation

• Numerous annotation tools
• Generates multiple instances of metadata about
  the same object
• Huge amount of data
• Necessity for the reconciliation
• Requirement for reconciliation
• Lack of interoperability between annotation sites
• Applying service-based architecture to annotation
  systems

6
Big Picture Semantic Research Grid (SRG)
Architecture
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Key Concepts of System Architecture

• Digital Entity (DE) a digital collection of
  metadata for a citation
• Event a time-stamped action on a digital entity.
  Our event-based model consists of
• Major Events
• Insertion or deletion of a digital entity
• Minor Events
• Modifications to an existing digital entity
• Dataset
• Collection of minor events
• Service-based Framework (SOAP over Http)

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Research Issues

• Event-based model
• Manipulating data and metadata
• How to build event-based model ?
• Major and Minor events
• Datasets (collection of minor events)
• How to apply event-based model ?
• How to apply modifications to a record (Digital
  Entity) ?
• Keep them in users session and let user apply
  them
• Apply them directly to a DE
• How to merge metadata field of a Digital Entity ?
• Identification of metadata fields as dynamic or
  static field
• How to apply service-based framework as wrapper?

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SRG System Modules I

• Digital Entity (DE) Management Service
• Manual DE entity into the system
• DE history
• DE versioning and flexible choices (rollback)
• Editing and more info tools for a DE (Update
  Model)
• Session and Event Management Services
• Event and dataset management
• DE view options
• User credentials (username/password) -
  cookie-based
• Annotation Tools Service
• Transfer Service
• Download service
• Upload Service

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SRG System Modules II

• Search Tools Services
• Google Scholar/Windows Live Academic
• Google Scholar Advanced
• Local Database Search
• Via integrated PubsOnline Tool from Indiana
  University
• My Research Database
• My Research Database Advanced
• Authentication and Authorization Services
• Login and Logout service
• DE Access rights management
• Database access rights management
• Administrative tools
• Other Services
• User Registration
• Username and password recovery
• Users Profile Management
• DE metadata view options

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Example Applications
CiteULike
Delicous
Connotea

• Transfer
• Download/Upload
• Modify Digital Entity (DE)
• Share DE with
• other users
• More info of a DE
• History of a DE
• and rollback

Core Web Services
Research Database
Research Database
Research Database
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Typical Scenario for Generating Minor Events
Research Databases

• 1 Client tries to modify a DE
• 2 Check user access rights.
• 3-4 If user has write access to this DE (a)
  build the current DE metadata from its events ,
  (b) saved the update metadata into session as
  minor event.
• 5 Show confirmation message

RDBMS
RDBMS
RDBMS
Main Database
Client
3
SRG Web Services
1,5
2
4
Session and Event Management
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Typical Scenario for Updating a DE from Minor
Events via Dataset Creation
Research Databases

• 1 Client can access all minor events for each DE
  from the user session
• 2-3 Select minor events to create dataset(s),
  and apply them on top of latest DE. Confirm
  dataset(s).
• 4 Save the events into the associated research
  database
• 5 Confirmation message

Client
RDBMS
RDBMS
RDBMS
Main Database
1
4
5
3
SRG Web Services
Session and Event Management
2
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Typical Scenario for Downloading DEs
Research Databases

• 1 Client request to download records from a
  social bookmarking website into a research
  database
• 2 Check user access rights
• 3-4-5 If user has write access, and DEs do not
  exist, then download them into the associated
  research database. If a DE exist in the research
  database, save the update metadata into user
  session as a minor event
• 6 Confirmation message

RDBMS
RDBMS
RDBMS
Client
6
Main Database
4
SRG Web Services
1
2
3
Session and Event Management
5
Social Bookmarking Websites
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Summary

• This paper addresses the following open research
  issues in management of Digital Entities
• Architecture for reconciling digital entities
• Allows the manipulation of a digital entity
• Applies Event-based model based on the concept
  of
• Major events
• Minor events
• Datasets
• Provides a rollback feature to
• Support for history tool for a DE
• Merge and change the content of a digital entity
• A service-based framework for using existing
  annotation tools through web services
• Prototype project web site
• http//gf6.ucs.indiana.edu58080/SRGrid

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• THANK YOU!
• Ahmet Fatih Mustacoglu
• amustaco_at_cs.indiana.edu
• http//www.cs.indiana.edu/amustaco