... over the target schema that satisfies the schema mapping. In general, a given source instance may have numerous different solutions. ...
Publication - hartung - 04/17/2013 - 12:16 - 0 comments - 1 attachment
... this challenge that have received considerable attention in recent years are data exchange and data integration. The study of data ... database schemas. Schema mappings are typically expressed in declarative languages based on logical formalisms and are chosen with two ...
Publication - cat - 04/17/2013 - 11:16 - 0 comments - 1 attachment
... 100 - 499 In this paper we describe a new approach to data integration which subsumes the ...
Publication - cat - 04/17/2013 - 07:16 - 0 comments - 0 attachments
... tools for automating it have been proposed and evaluated in the database community. Research in this area reveals that there is no single schema matcher that is guaranteed ...
Publication - avigal - 04/17/2013 - 02:05 - 0 comments - 1 attachment
... of interest arises when S is the class of all instances, in which case an S-inverse is a global inverse. We focus on the important ... we show how to construct an S-inverse when one exists. In particular, we show how to construct a global inverse when one exists. ...
Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment
... 676.21 KB In this article, we develop a relational algebra for metadata integration, ... where the number of relations and/or the number of columns in relations of the output varies dynamically with the input instance. Among ... generalized dynamic output schemas, where the values in any (fixed) number of input columns can determine output schemas.Further ...
Publication - cat - 04/16/2013 - 18:27 - 0 comments - 1 attachment
... problem. We present a novel approach to this problem, in which the relationship between the application data and the persistent ... is used to answer queries, while viewing the database in terms of the application model allows us to leverage view maintenance ... for update translation. This approach has been implemented in a commercial product. It enables developers to interact with a relational ...
Publication - huliganka - 04/16/2013 - 07:49 - 0 comments - 1 attachment
... relationship between independent and complementary views In unrestricted domains, a view (but not the identity or empty view) can have ... A view is monotonic if it preserves inclusion However, in finite power sets when all views are monotonic, if a given view has another ...
Publication - huliganka - 04/16/2013 - 05:49 - 0 comments - 1 attachment
... or within enterprises—has received much attention in the database and AI communities. The focus has been on building data ... a uniform query interface to the sources. A key bottleneck in building such systems has been the laborious manual construction of semantic ...
Publication - huliganka - 04/16/2013 - 05:27 - 0 comments - 0 attachments
... 10 - 49 The first step in finding an efficient way to solve any difficult problem is making a ... solved by these systems do not exist, or are partial. In this paper, we analyze the problem of seman- tic schema matching, identify ...
Publication - huliganka - 04/16/2013 - 05:16 - 0 comments - 0 attachments
... for a large part, this information will become available in XML. As such, it is a valuable source of information for other users, who ... to guide them through the wealth of information. In this report, we investigate a specific information finding approach – ...
Publication - huliganka - 04/16/2013 - 05:16 - 0 comments - 0 attachments
... administrators are called on to write complex mappings in which they specify in tedious detail how the data is to be transformed. Even once deployed, ...
Publication - cat - 04/16/2013 - 02:38 - 0 comments - 0 attachments
... two groups of relation schemata play important roles in a database environment. These transformations are used for obtaining normal ... belonging to one group of schemata are usually maintained in computer storage, while those belonging to another group of schemata can be ...
Publication - cat - 04/15/2013 - 20:27 - 0 comments - 1 attachment
