T. Catarci, S. K. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Software Engineering, 8(. 1996.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....[9] It is designed for relational database with table like interfaces. QBE can express most SQL queries including selection, projection, join, aggregation and transitive closure. Along with the success of QBE, many graphical languages for relational data appear such as QBD [2] GM (Graph Model) [3], GrIT [11] and Condor [14] etc. As to the semistructured data like XML, the graphical query languages for relational data cannot be simply modified even if we manage to store the data in an Object Oriented and or Relational Database Management System (OO RDBMS) 1, 16] because there is no ....

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455-475, 1996.

....them offers a general theoretical framework or general mechanisms for the combination of interactive data access services. In the area of HCI the works related to data access can be divided into two groups: one group is interested in the aspect of visual queries formulation and data presentation [7, 14, 15, 17, 29, 32], the other group concentrates on user interface design models [10, 11] and on formal models to express interactive systems behavior. The works in the first group deal mainly with the interesting topic of visualization techniques of data and user friendly interaction for formulating queries. They ....

T. Catarci, S. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. #### #################################################(3):455-475 (1996).

....is all textual, makes the description of it as a graphical system somewhat outmoded. Catarci, working with a variety of co authors, has proposed several systems over the years. These systems, including Query By Diagram (QDB ) and the Graph Model (GM) are based on variations of the E R model [1, 2]. QDB included a syntax for transitive closures, but it was based on a tabular presentation which did not seem to fit very well with the otherwise graphical presentation. The query graphs of GM are a hybridization of the E R model and semantic networks. Condor queries, based on the relational ....

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455 -- 475, 1996.

....provide a restricted amount of functionality to support interaction. An extreme case is for example, the telephone which is not able to offer any supporting functionality at all. Other approaches: Presently, approaches for formalizing interaction with an information system (e.g. CaTa 1995] [CCC 1996], CCL 1994] concentrate on the specification of the interface rather than on the process of interaction. Similarly web based paradigms like HTML or XML provide a logical representation of the interface with the user, but do not depict the actual activity of interaction. Paradigms like Java ....

Catarci, T.; Chang, S.-K.; Costabile, M. F.; Levialdi, S.; Santiccu, G.: A Graph-based Framework for Multiparadigmatic Visual Access to Databases. In: IEEE Transactions on Data and Knowledge Engineering. Volume 8. Number 3. 1996. Pages 455--475.

....with di#erent visual representations and access methods. The experimental results indicate that the appropriateness of a visual representation is strictly related with the level of users skill and the kind of query #Leventhal et al. 1995#, #Paton et al. 1995#, #Badre, Catarci Santucci 1996#, #Catarci et al. 1996#. We propose a uniform framework suitable in principle to model di#erent kinds of temporal information related with VQSs, namely those contained in historical databases as part of the application data #e.g. the employees salary history#; those contributing to the de#nition of the user model ....

....of the Graph Model and its temporal extension is out of the scope of this paper. The interested reader can refer to #Catarci et al. 1993#, #Catarci, Santucci Cardi# 1997#, #Fernandes Silva et al. 1997#. 2. 1 The Temporal User Model #a# Basic Notions Wehave adopted the user model de#ned in #Catarci et al. 1996#, which automatically provides the user with the most appropriate visual representation #form based, iconic, diagrammatic and hybrid# and the corresponding interaction modality, according to his or her skill and needs. Such a user model consists of three components: the class stereotype #CS#, the ....

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Catarci et al., T. #1996#, `A graph-based framework for multiparadigmatic visual access to databases', IEEE Transactions Knowledge on Data Engineering 8#3#, 455#475.

....with different visual representations and access methods. The experimental results indicate that the appropriateness of a visual representation is strictly related with the level of users skill and the kind of query (Leventhal et al. 1995) Paton et al. 1995) Badre, Catarci Santucci 1996) (Catarci et al. 1996). We propose a uniform framework suitable in principle to model different kinds of temporal information related with VQSs, namely those contained in historical databases as part of the application data (e.g. the employees salary history) those contributing to the definition of the user model ....

....of the Graph Model and its temporal extension is out of the scope of this paper. The interested reader can refer to (Catarci et al. 1993) Catarci, Santucci Cardiff 1997) Fernandes Silva et al. 1997) 2. 1 The Temporal User Model (a) Basic Notions We have adopted the user model defined in (Catarci et al. 1996), which automatically provides the user with the most appropriate visual representation (form based, iconic, diagrammatic and hybrid) and the corresponding interaction modality, according to his or her skill and needs. Such a user model consists of three components: the class stereotype (CS) the ....

[Article contains additional citation context not shown here]

Catarci et al., T. (1996), `A graph-based framework for multiparadigmatic visual access to databases', IEEE Transactions Knowledge on Data Engineering 8(3), 455--475.

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T. Catarci, S. K. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Software Engineering, 8(. 1996.

....What Happened When Database Researchers Met Usability 183 software houses, manufacturers, universities and actual users. The fact that users (mainly hospitals and research centers) were involved forced us to start interacting intensively with them while designing the multiparadigmatic interface [11, 22, 33]. That was our first interaction with real users (not students simulating to be users) and it was a frustrating experience. In fact, quite suddenly, we realized that many of our assumptions about users understanding of a visual query system were partly (or even completely) false y . For ....

....query language operators (see [12] and allowing the user to switch among them while expressing the query. At the beginning, the Query Formulation Manager selects the visual representation most appropriate for the current user based upon the user model elaborated by the User Model Manager (see [11]) Equivalent queries may be expressed using the different interaction modalities associated with the various visual representations. The User Model Manager continuously collects data about the actions performed by the user, maintaining a knowledge base of the user model components. Once a query ....

T. Catarci, S.K. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455--475 (1996).

....dell Informazione) and at the University of Bari, in cooperation with Professor S.K.Chang, University of Pittsburgh, USA, mainly in the framework of the Esprit Project 6398 VENUS . This Project has evolved during several years, producing various partial results (some relevant publications are [4, 5, 8, 10, 14, 13, 17, 18, 19]) and an implemented prototype. This paper mainly concentrates on the system prototype, in particular on its user oriented features, also describing some preliminary usability trials. The paper is organized as follows. Section 2 introduces the system architecture. In Section 3 the formal basis of ....

....query language operators (see [5] and allowing the user to switch among them while expressing the query. At the beginning, the Query Formulation Manager selects the visual representation most appropriate for the current user based upon the user model elaborated by the User Model Manager (see [4]) Equivalent queries may be expressed using the different interaction modalities associated with the various visual representations. The User Model Manager continuously collects data about the actions performed by the user, maintaining a knowledge base of the user model components. Once a query ....

[Article contains additional citation context not shown here]

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi and G. Santucci, "A Graph-based Framework for Multiparadigmatic Visual access to Databases," IEEE Transactions on Data and Knowledge Engineering, to appear.

....we believe the possibility of foreseeing the query is also worth considering, because many non professional users typically perform repetitive queries. This information may be usefully stored in an advanced query system capable of adapting to the user it is interacting with, as described in [91], where a system allowing a multiparadigm access to databases by exploiting form based, diagram based and icon based representations is proposed. In [106] a further paradigm based on virtual reality has been included in the multiparadigm framework. Another multiparadigm interface is described in ....

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi & G. Santucci (1996) A Graph-based Framework for Multiparadigmatic Visual Access to Databases. IEEE Trans. Knowledge and Data Engineering 8, 3,455-475. 38

....of local closure, i.e. to verify the actual presence of information in the source during plan execution. 2.3. An Integrated Approach: WAG In the WAG (Web At a Glance) project [16, 17] a database conceptual model (namely the Graph Model [21, 22] and its environment to interact with the user [18] are coupled with the CLASSIC knowledge representation system [9] This gives rise to a system aiming at semiautomatically building conceptual views over information extracted from various Web sites and allowing the user to query such views. WAG differs from the approaches described above in two ....

....been fully analyzed, the user can query the WEB DataBase through the WAG Querier, according to several query modalities provided by the system. The WAG Querier handles all phases needed to answer a user s query. In particular, it provides the user with a multiparadigmatic visual environment (see [18]) equipped with different visualizations and interaction mechanisms, including a synchronized browser on the database schema and instances and several ad hoc features for interacting with multimedia data. 3. Semistructured Data Models Data that could be find on the Web are very disomogeneous and ....

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T. Catarci, S. K. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Software Engineering, 8(3):455--475, 1996.

....from the site. The conceptualizer relies on an object based data model, the Graph Model [CSA93, CSC97] which is both semantically rich and equipped with a relationally complete set of graphical query primitives, which have been already used as formal basis for a multiparadigmatic visual interface [CCCLS96]. A Graph Model DataBase (GMDB) is constituted by: 1) an intensional part, comprising the schema of the database, the so called Typed Graph, and a set of constraints, including the standard ISA and cardinality constraints, and 2) an extensional part, i.e. the instances of the database, ....

....have been already presented in [CSC95] 2.2 The WAG Querier The WAG Querier (see Fig 3) handles all the phases needed to answer a user query: query formulation, query distribution, and query result presentation. In particular, it provides the user with a multiparadigmatic visual environment (see [CCCLS96]) equipped with different visualizations and interaction mechanisms, including a synchronized browser on the database schema and instances and several ad hoc features for interacting with multimedia data. User Interface THE WEB WEB DataBase WAG QUERIER Query Manager Result Manager WAG Engine ....

T.Catarci, S.K.Chang, M.F.Costabile , S.Levialdi , G.Santucci. "A Graph-based Framework for Multiparadigmatic Visual Access to Databases." IEEE Transactions on Knowledge and Data Engineering, 8:3, pages 455-475, 1996. 22

.... layered approach by defining the architecture of a so called multiparadigmatic VQS. Such a system provides an environment for querying databases expressed in different models and an adaptive interface exploiting several visual representations and interaction mechanisms (Catarci et al. 1994; Catarci et al. 1995). The most notable features of our approach are: The presence of a common formalism for expressing databases. This formalism is sufficiently abstract to represent, in principle, a database expressed in any of the most common data models; The precise definition of suitable translations among ....

....the latter to the objects of the real world. The visual representations are displayed on the screen through appropriate drawings, which emphasize aesthetic criteria that depend also on the available hardware devices (a colour screen, a black white screen, etc. For more details and examples see (Catarci et al. 1995). The interaction paradigms are influenced from the visual representations. Indeed, queries on diagrammatic representations are mainly expressed by following links, form based queries are often performed by filling forms with prototypical values, and iconic queries can be constructed by spatially ....

Catarci, T., Chang, S. K., Costabile, M. F., Levialdi, S. & Santucci, G. (1995), "A Graphbased Framework for Multiparadigmatic Visual Access to Databases", IEEE Transaction on Knowledge and Data Engineering, 7(4).

....areas and it is based on three key issues: 1. the building of a conceptual representation for any domain of interest, which is populated with data extracted from the Web, so to constitute a fully materialized view; 2. the availability of a visual interface to easily query such a materialized view [3]; 3. the adoption of both an internal modeling of the information and several acquisition mechanisms based on Description Logics [4] There are other approaches (see Section 2) sharing similar objectives with WAG. However, WAG differs from all of them mainly because, instead of requiring an ....

....open problems could be solved by combining database and artificial intelligence techniques. This is the idea we are following in the WAG (Web At a Glance) project [19, 2] by coupling a database conceptual model (namely the Graph Model [20, 21] and its environment to interact with the user [3] with the Classic knowledge representation system [4] in a system aiming to semi automatically build conceptual views over information extracted from various Web sites and to allow the user to query such views. The main differences with other Database approaches (e.g. Tsimmis and ARANEUS) are ....

[Article contains additional citation context not shown here]

T. Catarci, S. K. Chang, M. F. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Software Engineering, 8(3):455--475, 1996.

....and Dipartimento di Scienze dell Informazione) and Bari, in cooperation with Professor S.K.Chang, University of Pittsburgh, USA, mainly in the framework of the Esprit Project 6398 VENUS . This Project has evolved during several years, producing various partial results (relevant publications are [5, 6, 7, 10, 12, 14, 15, 23, 24, 25]) and an implemented prototype. This paper mainly concentrates on the system prototype, in particular on its user oriented features, also describing some preliminary usability trials. The paper is organized as follows. Section 2 introduces the system architecture. In Section 3 the formal basis ....

....query language operators (see [7] and allowing the user to switch among them while expressing the query. At the beginning, the Query Formulation Manager selects the visual representation most appropriate for the current user based upon the user model elaborated by the User Model Manager (see [6]) Equivalent queries may be expressed using the different interaction modalities associated with the various visual representations. The User Model Manager continuously collects data about the actions performed by the user, maintaining a knowledge base of the user model components. Once a query ....

[Article contains additional citation context not shown here]

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi and G. Santucci, "A Graph-based Framework for Multiparadigmatic Visual access to Databases," IEEE Transactions on Data and Knowledge Engineering, June 1996, to appear.

No context found.

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi, and G. Santucci. A graphbased framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455--475, 1996.

No context found.

T. Catarci, S.K. Chang, M.F. Costabile, S. Levialdi, and G. Santucci. A graphbased framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455--475, 1996.

No context found.

T. Catarci, S. Chang, M. Costabile, S. Levialdi, and G. Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455--475, 1996.

No context found.

Tiziana Catarci, Shi-Kuo Chang, Maria F. Costabile, Stefano Levialdi, and Giuseppe Santucci. A graph-based framework for multiparadigmatic visual access to databases. IEEE Transactions on Knowledge and Data Engineering, 8(3):455--475, June 1996.

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