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The increasing complexity of knowledge-intensive applications, such as information integration, semantic search, semantic web services, collaborative knowledge sharing and exchange, demands more and more for ontology coordination systems with functionalities for knowledge discovery and acquisition to enable enhanced ontology design, maintenance, and querying functionalities [1,2].
In this demonstration we will show a series of tools that support a methodology [1] for the design of complex similarity functions in the context of heterogenous XML systems.
In vertical search engine research, many works have been reported. But most of them focus on its key issues such as crawling, extraction, and query and few of them give a total solution for building a complete vertical search engine from scratch in a systematic method. To address this issue, we propose a model-driven method and its supporting tool SESQ. Based on a user defined ER schema for a target...
New sensing technologies and the decreasing cost of Information and Communication Technologies (ICTs) make possible the development of electronic Health (eHealth) monitoring systems. The challenges of such systems include the representation of data extracted from various sensor devices by knowledge workers through semantic enrichment and integration. Also, the data must be stored in a format suitable...
Query formulation is still a difficult task whenever a database schema is large or complex. The user has to entirely understand the schema before a correct and complete formulation of the query will be found. Furthermore, users may overlook types in the SQL schema that must be used in the query. Visualization based on Visual SQL leads to higher conceptual correctness and conceptual completeness.
While online transaction processing (OLTP) databases are modeled with Entity-Relationship Diagrams (ERDs), data warehouses constructed from these OLTP DBs are usually represented as star schema. Designing data warehouse schemas, however, is very time consuming. We present a prototype system, SAMSTAR, which automatically generates star schemas from an ERD. The system takes an ERD drawn by ERwin Data...
XML has been widely accepted as the standard data representation for web applications. The XML Stylesheet Language for Transformations (XSLT) [7][3] is an increasingly popular language for query-like operations on XML documents, including data filtering and reconstruction. When handling XML documents with large size, the main memory buffer requirement in XSLT evaluation can be significant, which also...
The quality management of software models is an important issue. As a preparative task, the quality circle requires quality planning. After that a software model can repeat the sequence: quality measurement, quality analysis, and quality improvement. Until now, existing tools lack support for all these activities at once. Therefore, we developed and implemented concepts that provide the full quality...
Semantic Web service composition is a discovery process in which a given set of requirements are fulfilled by dynamically locating and assembling semantically annotated services [5,6]. Semantic annotation of Web services is a set of models that describe its properties (e.g., inputs, outputs, process), in a formal language such as OWL-S [2]. These models provide an unambiguous description of service...
Requirements reuse has been recently pointed out as one of the most pressing needs and grand challenges in Requirements Engineering. To cope with this demand, this work presents a systematic requirements reuse approach in the Model-Driven Software Development context. The proposal revolves around REMM, a Requirements Engineering MetaModel, which has been recently extended to provide variability modeling...
The current web is a web of linked pages. Frustrated users search for facts by guessing which keywords or keyword phrases might lead them to pages where they can find facts. Can we make it possible for users to search directly for facts embedded in web pages? Instead of a web of human-readable pages containing machine-inaccessible facts, can the web be a web of machine-accessible facts superimposed...
The goal of this demonstration is to present MDBE, a tool implementing our methodology for automatically deriving multidimensional schemas from relational sources, bearing in mind the end-user requirements. Our approach starts gathering the end-user information requirements that will be mapped over the data sources as SQL queries. Based on the constraints that a query must preserve to make multidimensional...
In recent years, the complexity of software systems has risen sharply, so that the role of conceptual modeling is more important than ever. To capture this complexity, different groups of individuals are now involved in modeling different aspects of the system, rather than a few people modeling internals of a software system. These different groups of persons concentrate their modeling effort on different...
Uncertainty management at the core of data integration was motivated by new approaches to data management, such as dataspaces [2] and the use of fullyautomatic schema matching takes an increasingly prominent role in this field. Recent works suggested the use, in parallel, of several alternative schema matching, as an uncertainty management tool [3,1]. We offer in this work OntoMatcher, an extension...
This paper contains a brief description of the R2M (Role and Request Modeling) method and its supporting visual modeling CASE (Computer Assisted Software Engineering) tool. R2M is a modeling method for creating Conceptual Models of work systems using a combination of ontological and object-oriented concepts. The ontological principles serve to define the meaning of modeling constructs in terms of...
Model ManagementMM is a way of raising the level of abstraction in metadata intensive application areas. The key idea behind Model Management is to develop a set of generic algorithmic operators that work on schemas and mappings between schemas, rather than individual schema elements. In this demonstration we present a new approach to the implementation of MM operators based on schema transformation...
We present a metamodeling tool to support a modeling methodology which we have succesfully applied in the field of software quality. As a distinguishing and general purpose functionality, it implements the concept of induced associations, which are introduced by the tool when the user instantiates metaclasses related by inducing metaassociations in the metamodel.
It is well known that SQL’s syntax sometimes forces users to write queries in an awkward way. Together with the danger of formulating an incorrect query, complex queries pose a challenge to the optimizer. A well studied example is that of universal quantification [1,2]. As an example, assume two relations: student(sid) and teaches(pid,sid), which denotes that professor pid is a teacher of student...
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