The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The semantic web inherent the dynamic feature of the web we used today, and applications on the semantic web have to adapt themselves when the ontology they depended on had evolved. In order to adapt the ontology based data access system under dynamic environment, one of the most important problems is detecting and repairing the broken mappings when ontology (which acts as a concept view) evolved...
Nowadays, many organizations face the problem of how to accessing the legacy data by means of flexible mechanism. As a powerful and efficient solution to this problem, ontology-based data access (OBDA) technology enables people to utilize data from heterogeneous sources through a well-defined ontology. However, under the dynamic environment, the ontology which acts as concept view in an OBDA application...
Semantic mappings between relational database and ontology are very useful in ontology-based relational data integration system. However, managing those semantic mappings is an arduous work in an open and dynamic environment. Aiming at facilitating the work of managing semantic mappings, a model named view graph is proposed in this paper. View graph retains the semantics discovered during the process...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.