... Skarra, A Zdonik, S ... such may be modified and shared. The effects of changing a type extend to objects of the type and to programs that use objects of the ...
Publication - cat - 06/15/2023 - 14:51 - 0 comments - 1 attachment
... McBrien, P; Poulovassilis, A Author: ... Poulovassilis, A Year: ...
Publication - cat - 09/13/2022 - 17:45 - 0 comments - 0 attachments
... design (CAD) systems. In this paper we address a broad spectrum of semantic and operational issues in version control for a public/private distributed architecture of CAD systems. The research issues ...
Publication - cat - 07/28/2016 - 08:29 - 0 comments - 0 attachments
... have become even more important. Although there is already a lot of research done in this area, there are still many open questions. In ... paper we try to classify the problems that may arise into a common framework. We then use that framework to examine several projects that ...
Publication - admin - 07/26/2016 - 16:40 - 0 comments - 0 attachments
... 11.7 KB A methodology for extracting an extended Entity-Relationship (EER) model from a relational database is presented. Through a combination of data schema and data instance analysis, an EER model is ...
Publication - cat - 04/17/2013 - 13:27 - 0 comments - 1 attachment
... Noy, Natalya Fridman; Musen, Mark A. Author: ... As ontology development becomes a more ubiquitous and collaborative process, developers face challenges in ...
Publication - cat - 04/17/2013 - 13:05 - 0 comments - 0 attachments
... 277.31 KB Database systems offering a multidimensional schema on a logical level (e.g. OLAP systems) are often used in data warehouse ...
Publication - cat - 04/17/2013 - 12:49 - 0 comments - 1 attachment
... KB This paper describes work carried out on a model for the versioning of class definitions in an object-oriented database. ... on attributes of the previous and current version of a class definition, instances of any version of the class can be converted to ...
Publication - cat - 04/17/2013 - 12:38 - 0 comments - 1 attachment
... COMA++. It extends our previous prototype COMA utilizing a composite approach to combine different match algorithms [3]. COMA++ implements significant improvements and offers a comprehensive infrastructure to solve large real-world match problems. It ...
Publication - Anonymous - 04/17/2013 - 11:16 - 0 comments - 1 attachment
... sources. To be effective, such systemsmust provide a unified, queryable schema, and must be able to transform data from different ... to connect to several information sources makes them a natural base for doing more complex transformations as well. In this paper, ...
Publication - massmann - 04/17/2013 - 10:38 - 0 comments - 1 attachment
... to improve the matching effectiveness. This paper presents a dynamic multistrategy ontology alignment framework, named RiMOM. The key ... between ontologies may vary widely. We propose a systematic approach to quantitatively estimate the similarity characteristics ...
Publication - george - 04/17/2013 - 10:38 - 0 comments - 0 attachments
... for database applications. The paper presents a method for measuring modifications to database schemata and their consequences, by using a thesaurus tool. Measurements of the evolution of a large-scale database application currently running in several hospitals in ...
Publication - cat - 04/17/2013 - 10:27 - 0 comments - 0 attachments
... prototype data translation system which can access a wide variety of data and restructure it for new uses. The system is driven ... presented. The DEFINE description is compiled into a customized PL/l program for accessing source data. The restructuring ...
Publication - erhard - 04/17/2013 - 10:16 - 0 comments - 0 attachments
... 420.56 KB Schema evolution is a problem that is faced by long-lived data. When a schema changes, existing persistent data can become inaccessible unless the ... the database maintainer can perform. We have developed a model of type changes involving multiple types. The model describes both type ...
Publication - erhard - 04/17/2013 - 10:05 - 0 comments - 1 attachment
... 100 - 499 A database view is a portion of the data structured in a way suitable to a specific on views ...
Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments
... N Keller, A Wiederhold, G ... The view-object model provides a formal basis for representing and manipulating object-based views on ...
Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments
... problem in modern information systems. We present a novel framework for mapping among XML and relational schemas in which a high-level mapping is translated into semantically meaningful queries that ... Our approach works in two phases. In the rst phase, a high-level mapping, expressed as a set of attribute-to-attribute ...
Publication - massmann - 04/17/2013 - 09:27 - 0 comments - 0 attachments
... of both practitioners and researchers would be helped by a more objective and finer granularity recognition of types of software ... as actually done. To these ends, this paper proposes a clarifying redefinition of the types of software evolution and software ...
Publication - erhard - 04/17/2013 - 09:16 - 0 comments - 0 attachments
... Shmueli, O; Itai, A Author: ... O Itai, A Year: ...
Publication - cat - 04/17/2013 - 08:05 - 0 comments - 1 attachment
... L Maedche, A Motik, B ... complexity of change management increases, thus requiring a well-structured ontology evolution process. In this paper we identify a ...
Publication - erhard - 04/17/2013 - 08:05 - 0 comments - 1 attachment
... McBrien, P; Poulovassilis, A Author: ... Poulovassilis, A Year: ...
Publication - cat - 04/17/2013 - 07:16 - 0 comments - 0 attachments
... 100 - 499 When a database is shared by many users, updates to the database schema are almost always prohibited because there is a risk of making existing application programs obsolete when they run against ...
Publication - cat - 04/17/2013 - 06:38 - 0 comments - 0 attachments
... Rundensteiner, Elke A.; Koeller, Andreas; Zhang, Xin ... E Koeller, A Zhang, X ...
Publication - cat - 04/17/2013 - 06:16 - 0 comments - 1 attachment
... 36.23 KB Schema Evolution is the ability of a database system to respond to changes in the real world by allowing the ... to evolve. In many systems this property also implies a retaining of past states of the schema. This latter property is necessary if ...
Publication - cat - 04/17/2013 - 05:16 - 0 comments - 1 attachment
... 1.67 MB Ontologies play a key role in the advent of the Semantic Web. An important problem when dealing ... is the modification of an existing ontology in response to a certain need for change. This problem is a complex and multifaceted one, ...
Publication - cat - 04/17/2013 - 04:27 - 0 comments - 1 attachment
