Transcript Digital Libraries Lillian N. Cassel Fall 2009 A digital library • An informal definition of a digital library is a managed collection of information,

Digital Libraries
Lillian N. Cassel
Fall 2009
A digital library
• An informal definition of a digital library is a
managed collection of information, with
associated services, where the information is
stored in digital formats and accessible over a
network. -• William Arms, Digital Libraries, 1999
• A focused collection of digital objects,
including text, video, and audio, along with
methods for access and retrieval, and for
selection, organization, and maintenance of
the collection. -• Witten and Bainbridge, How to Build a Digital Library 2003
Overview of this course
• This course is about presentation of
information on the Web, with special attention
to Digital Libraries.
• Required coursework will include
– Readings, discussion (in class and online), and
projects. There will be no examinations, unless
circumstances indicate a need for one.
• Class web page and WebCT/Blackboard
Goals for Class 1
• Introduce the concept of a digital library
• Introductions: Who are we and what do we want to achieve in
this class?
• Review the course structure
– Look at WebCT
– Describe assignments, projects to be expected
– Look at the calendar
• Introduce some tools – Concept maps
• Make sure we know what a traditional library is!
• Introduce the 5 S model for digital libraries
Some tools - concept maps
• Concept Maps
– A graphical representation of concepts, ideas,
topics, entities and relationships among them.
– A useful tool: cmap from IHMC
• See http://cmap.ihmc.us/
• Explore the cmap page, including a concept map about
concept maps
• Do a pencil & paper concept map on a subject of interest
to your group -- a sport, a season of the year, a career
interest, whatever. Use at least 20 nodes. We will look
at a selection of these and offer suggestions.
What is a library?
• An active exercise to explore what we
know about, and think about, traditional
libraries.
• How do we translate these
characteristics to the digital world?
– Is that the right model? Are we
unnecessarily constraining the digital
environment? Are there things that do not
translate?
The 5 S model
• There are many details to digital
libraries
• The 5S model gives us a base to work
from in creating a new DL
• The 5S model is the work of Edward A.
Fox and his students at Virginia Tech.
These slides rely heavily on that work.
The 5S model
• Streams
– The flow of information in various formats
• Structures
– Organizational aspects of the DL
• Spaces
– Views of components; real or abstract images
• Scenarios
– Services and behaviors
• Societies
– Communities and relationships among them
5S Summary
Model
Primitives
Formalisms
Objectives
Stream
Text; video, audio,
software program
Sequences, types
Describes properties of the DL
content, encoding and textual
material or particular forms of
multimedia data.
Structure
Collection, catalog;
hypertext; document;
metadata;
organizational tools
Graphs; nodes; links;
labels; hierarchies
Specifies organizational aspects
of the DL content
Space
User Interface;
index; retrieval
model
Sets; operations; vector Defines logical and
space; measure space; presentational views of several
probability space
DL components
Scenarios
Service, event;
condition; action
Sequence diagrams;
collaboration diagrams
Details the behavior of DL
services
Societies
Community;
managers; actors;
classes;
relationships;
attributes; operators
Object-oriented
modeling constructs;
design patterns
Defines managers responsible
for running DL services; actors
that use those services, and
relationships among them
Source: http://www.dlib.vt.edu/projects/5S-Model/
Some examples
• The Etana project
– Nice because the things that are “in” the
digital library are real (not digital) objects
• CITIDEL and computingportal
– These are projects with local involvement
– You may want to connect to these
Etana - A DL for archeology
An example application of 5S Etana: A DL for an archeological site
Scenario
model
Society model
Archaeologist
General public
Services
Value added
Service Manager
Domain specific
Space model
Geographic space
Structure
model
Region
Stream
model
User interface
Text
*Partition
Video
Information Satisfaction
Metric space
Metadata
*Site
Repository building
*Sub-partition
Audio
Taxonomies
Spatial
Temporal
Artifact-specific
*Locus
Drawing
*Container
Photo
*Artifact
3D
Source: E. A. Fox http://feathers.dlib.vt.edu/
CITIDEL
• The Computing and Information
Technology Interactive Digital Education
Library
• Located at Villanova
• Built in DSpace
• www.citidel.org
Ensemble
• ComputingPortal.org
• A larger example of what a digital library
can be.
– A real community center
– Upcoming events, things to share, meeting
places
• Underlying repository is fedora
• Front end through Drupal
Class 1 summary
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Course plan described and discussed
Class members surveyed
Tools – concept maps -- introduced
Concept mapping practiced
The idea of a library, and of a digital
library, explored.
• The 5S model introduced
• Some example digital libraries explored
Next week:
• Check the calendar
– Readings and an assignment due
• The 5 S model for digital libraries (and
other information retrieval systems)
continued
• .Always check the calendar. I will
update that as things change