... KB Schema matching is a critical step in many applications, such as XML message mapping, data warehouse loading, and schema integration. In this paper, we investigate algorithms for generic schema matching, ...
Publication - admin - 04/17/2013 - 10:49 - 0 comments - 1 attachment
... ALIMONY-BEA-SDSI.pdf 954.46 KB In this paper, we describe an in-progress effort to augment the data integration capabilities of a ... and service-enabling heterogeneous enterprise data sources in order to deliver data services for use by SOA applications. The schema ...
Publication - cat - 04/17/2013 - 04:05 - 0 comments - 1 attachment
... it is rare that a schema mapping possesses an inverse. In this paper, we introduce and study the notion of a quasi-inverse of a ... negative results about the existence of quasi-inverses. In particular, we show that every LAV (local-as-view) schema mapping has a ...
Publication - huliganka - 04/17/2013 - 02:49 - 0 comments - 1 attachment
... a tool, TReMer, for performing the merge operation in a model-driven development setting. Merge is arguably one of the most ... analysis over them. TReMer draws on the theory developed in our earlier work where we describe how a set of models can be merged ...
Publication - cat - 04/17/2013 - 02:38 - 0 comments - 1 attachment
... molecular functions, and biological processes used in the annotation of genes and gene products. These constitute three separate ... The question we address here is: how are the terms in these three separate ontologies related to each other? We use statistical ...
Publication - hartung - 04/17/2013 - 02:05 - 0 comments - 1 attachment
... maintenance problem that has only been studied in the framework of traditional information systems. However, the problem is likely to be even more severe in web information systems, where open-source software is often developed ...
Publication - krlis1337 - 04/17/2013 - 02:05 - 0 comments - 1 attachment
... is proposed, and its application to the system described in Johnson et al. [15] is illustrated. Two judges categorized errors according ... The results of applying the model to the system described in [15] reveal the reason for a puzzling set of results in that paper, and also ...
Publication - hartung - 04/17/2013 - 01:49 - 0 comments - 1 attachment
... information systems that is further exacerbated in web information systems, such as Wikipedia and public scientific databases: in these projects based on multiparty cooperation the frequency of database ...
Publication - krlis1337 - 04/17/2013 - 01:38 - 0 comments - 1 attachment
... 295.69 KB With the wider use of ontologies in the Semantic Web and as part of production systems, multiple scenarios for ... the new versions serendipitously; ontology-development in a collaborative environment can be synchronous or asynchronous; managers of ...
Publication - hartung - 04/17/2013 - 00:49 - 0 comments - 1 attachment
... Multiversion support for XML documents is needed in many critical applications, such as software configuration control, ... warehouses, and ”e-permanence” of web documents. In this paper, we introduce efficient and robust techniques for: (i) storing ...
Publication - huliganka - 04/17/2013 - 00:38 - 0 comments - 1 attachment
... or XML schemas, and can be independently designed. In addition to the source-to-target mappings, we consider as part of the ... at the target. We define the semantics of query answering in such an integration scenario, and design two novel algorithms, basic query ...
Publication - huliganka - 04/17/2013 - 00:38 - 0 comments - 1 attachment
... schema matching has proven to be an important first step in developing mappings for data exchange, integration, restructuring and schema evolution. In this paper we investigate contextual schema matching, in which selection ...
Publication - huliganka - 04/17/2013 - 00:16 - 0 comments - 1 attachment
... 666.47 KB Many problems in information integration rely on specifications, called schema mappings, that ... for both relational and nested data are well-known. In this work, we present a new formalism for schema mapping that extends these existing formalisms in two significant ways. First, our nested mappings allow for nesting and ...
Publication - huliganka - 04/17/2013 - 00:05 - 0 comments - 1 attachment
... 180 KB In order to formulate a meaningful XML query, a user must have some knowledge ... assumed by the user, thus causing the query to fail. In this paper, we try to solve this query and data schema mismatching problem ...
Publication - huliganka - 04/16/2013 - 23:49 - 0 comments - 1 attachment
... support for programming schema mappings is still lacking. In particular, a tool for debugging schema mappings has not yet been developed. In this paper, we propose to build a debugger for understanding and exploring ...
Publication - huliganka - 04/16/2013 - 23:38 - 0 comments - 1 attachment
... labeled trees are trees whose nodes are labeled and in which the left-to-right order among siblings is significant. We consider ...
Publication - huliganka - 04/16/2013 - 23:38 - 0 comments - 1 attachment
... be a Σ1-query. An (equivalent) reformulation of q1 in the presence of C is a Σ2-query, q2, such that q2 gives the same ... ∪ Σ2-database instance that satisfies C. In general, there may exist multiple such reformulations and choosing among ...
Publication - huliganka - 04/16/2013 - 23:38 - 0 comments - 1 attachment
... Venue: In Proceedings of the Symposium on Principles of Database Systems (PODS), pages ... have recently been investigated for relational data.In this paper, we start looking into the basic properties of XML data exchange, ...
Publication - hartung - 04/16/2013 - 22:16 - 0 comments - 1 attachment
... ad-hoc information sharing between autonomous peers in a dynamic environment. Automating their discovery is one of the ...
Publication - huliganka - 04/16/2013 - 21:16 - 0 comments - 1 attachment
... heterogeneities between autonomous data sources are key in the emerging networked world. Our doctoral research investigates ... ad-hoc information sharing between autonomous peers in a dynamic environment. Automating their discovery is one of the ...
Publication - huliganka - 04/16/2013 - 21:16 - 0 comments - 1 attachment
... where data items originated, but also why they appear in the integration as they do and through what transformation they were derived. This problem is known as data provenance. In this work, we consider data provenance at the schema and mapping level. In ...
Publication - huliganka - 04/16/2013 - 20:49 - 0 comments - 1 attachment
... matching, we must also compute indirect element matches. In this paper, we present a framework for generating direct as well as ...
Publication - huliganka - 04/16/2013 - 20:49 - 0 comments - 1 attachment
... of two data schemas or two data instances plays a key role in data warehousing, e-business, or even biochemical applications. In this paper we present a matching algorithm based on a fixpoint computation ...
Publication - admin - 04/16/2013 - 20:16 - 0 comments - 1 attachment
... XML documents and databases has become a critical problem. In this paper, we present a hybrid schema match algorithm - QMatch - that ... while exploiting additional information inherent in XML documents such as the order of XML elements to provide improved levels ...
Publication - huliganka - 04/16/2013 - 20:16 - 0 comments - 1 attachment
... Database transformations is a critical task that occurs in many different domains. Schema evolution is one important class of problems for database transformations. In our work, we use existing technology and standards (ODMG, OQL, basic ...
Publication - cat - 04/16/2013 - 19:16 - 0 comments - 1 attachment
