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Multimedia Content Management
Tool for Digital Library
The dLibra software
package was written to help build and manage such IST services
like multimedia digital publications and books, distance
lectures, media on demand and many others formed in digital
libraries (DL). Making easier the management of multimedia
content, metadata and objects, dLibra can help everybody
to build and serve his/her digital library, containing documents
composed of such multimedia objects like text, audio, video,
images, animations, etc.
The main components of dLibra
- metadata management and DL logic module,
- multimedia storage servers,
- web application for content presentation,
- content management application.
The metadata management
and DL logic module is responsible for storing and managing
data which describes library content. This information is
based on the internet standard - Resource Description
Framework (RDF). DL logic allows users to organize their
documents in folders and subfolders and manage access rights
for other users. All data required to realize these functions
are stored in a database.
Multimedia storage servers are used
for the storage of library documents and objects contained
in these documents. dLibra can use many storage servers,
each one being different, all contained in one library.
For example a library can contain one storage server for
text files, one for sounds and one for video. Each type
of server can be dedicated for objects of each kind. This
allows specialized servers to be used. The video server
can store video files and serve them using some real time
streaming protocols. The text server can serve its documents
using the HTTP protocol. Specialized servers can also care
for transforming its objects for user needs: from scaling
video stream bandwidth to automatic translation of texts.
dLibra can use many
existing types of servers and is ready to include commercial
products, usually by the writing of a small gateway to use
the standard dLibra interface for storage servers.
The media object management module manages all storage servers
in the library and directs documents and their multimedia
objects to the proper server.
Web application is
served on an HTTP server. It is designed for easy browsing
and library searching. Using standard web browsers users
gain access to library content. The several forms allow
the searching for documents using their RDF descriptions
as well as searching individual objects based on their properties.
Users can also browse the library using folders and subfolders.
For the best integration with the future Internet search
engines, all of the presented documents contain embedded
The content management
application is a Java application used for managing
library content. Its main purpose is to put new documents
into a library and users have many options for managing
already existing documents. This application reads new documents
from local files and tries to discover the largest possible
amount of information describing a document from its content.
dLibra is a foundation
technology planned to support other multimedia services,
like: distance learning, media on demand and electronic
dLibra is the proper
software used for the development of services for Information
Society Technologies such as:
- multimedia digital publications,
- distance education,
- multimedia books,
- media on demand,
- virtual museums.