Environmental Engineering Reference
In-Depth Information
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Information can be found directly in the subdivisions of the knowledge base by a
Google-type search. Most pieces of information are supplemented by keywords,
which can be used in a keyword-directed search;
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ENFO established an “easy'' version for everyday users and children in order to
open the door of science to everyone. It is available only in Hungarian.
3 THE INFORMATICS BACKGROUND OF THE ENFO
KNOWLEDGE BASE
Z. Siki
3.1 IT tools used for creating the ENFO knowledge base
For managing ENFO's web portal and knowledge base, an innovative DST system for
risk-based environmental management, a three-tiered architecture client-server was
designed, as shown in Figure 12.4 (Siki, 2009). The advantages of this three-tiered
system are linearity and straightforward connections/topology.
In the data tier, remote and local databases are combined. In addition to our own
databases, we use remote public map data, denoted by dashed border, as WEB map
services.
In the center of the logic (application) tier, the Apache WEB server can be found.
All clients connect first to the Apache server, which dispatches the user queries to
the other components/servers. Our WEB portal is managed by the Drupal content
management system (CMS). Benefits of a CMS are separate design, structure and
Figure 12.4 Three-tiered architecture.
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