Download Data Uncertainty Engine (DUE) User`s Manual

The connection dialog (figure 3a) displays the parameters for connecting to a DUEenabled database. These parameters include the name of the database or the
Oracle system identifier (SID), the location or Universal Resource Locator (URL), the
port number on the host server, the database driver and the username and password
of a given user. The “Call” button is used to connect to the database, and results in
the display of all schemas and projects available to a user. Once a schema and
project has been selected, the “Next” button or “Search” tab can be used to display
the Search Dialog (figure 3b). To view information in the prototype database,
establish an Internet connection, enter irsa_train for the username, irsa_train
for the password, and select the “IRSA_TRAIN” schema and the “TRN” project.
Figure 3b: The user interface for searching a DUE-enabled database
A combination of list selection and graphic visualisation are used to search the
database for objects and attributes (only list selection is available in Version 3.1 of
DUE). List selection employs a set of ‘query models’, representing routes into the
database, to locate objects and attributes. The query models are located in dropdown menus at the bottom of the “Search” dialog. These menus also facilitate
keyword searches on items in the tables (e.g. entering “soil” in first menu, followed by
ENTER will filter the results by this keyword, displaying one item: “The soil
dictionary”).
The route into the database will depend on the types of objects and attributes
required and the meta-information available to locate them, but multiple routes are
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