NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Structured Course Objects in a Digital LibraryWe are developing an Undergraduate Digital Library Framework (UDLF) that will support creation/archiving of courses and reuse of existing course material to evolve courses. UDLF supports the publication of course materials for later instantiation for a specific offering and allows the addition of time-dependent and student-specific information and structures. Instructors and, depending on permissions, students can access the general course materials or the materials for a specific offering. We are building a reference implementation based on NCSTRL+, a digital library derived from NCSTRL. Digital objects in NCSTRL+ are called buckets, self-contained entities that carry their own methods for access and display. Current bucket implementations have a two level structure of packages and elements. This is not a rich enough structure for course objects in UDLF. Typically, courses can only be modeled as a multilevel hierarchy and among different courses, both the syntax and semantics of terms may vary. Therefore, we need a mechanism to define, within a particular library, course models, their constituent objects, and the associated semantics in a flexible, extensible way. In this paper, we describe our approach to define and implement these multilayered course objects. We use XML technology to emulate complex data structures within the NCSTRL+ buckets. We have developed authoring and browsing tools to manipulate these course objects. In our current implementation a user downloading an XML based course bucket also downloads the XML-aware tools: an applet that enables the user to edit or browse the bucket. We claim that XML provides an effective means to represent multi-level structure of a course bucket.
Document ID
20040086501
Document Type
Other
Authors
Maly, K. (Old Dominion Univ. Norfolk, VA, United States)
Zubair, M. (Old Dominion Univ. Norfolk, VA, United States)
Liu, X. (Old Dominion Univ. Norfolk, VA, United States)
Nelson, M. (Old Dominion Univ. Norfolk, VA, United States)
Zeil, S. (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 1999
Subject Category
Documentation and Information Science
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry