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Using WG-Log Schemata to Represent Semistructured Data [chapter]

E. Damiani, B. Oliboni, L. Tanca, D. Veronese
1999 Database Semantics  
Our proposal is based on WG-Log, a graph based language for the representation of WWW site information.  ...  We show how information encoded in a typical semistructured information model, as OEM, can be represented and queried by means of the WG-Log language, and how the TSIMMIS and WG-Log Web Query System can  ...  Acknowledgments The authors wish to thank A. Dovier, M. Baldi and F. Insaccanebbia for many useful discussions on the subject. Thanks are also due to H. Garcia-Molina and R.  ... 
doi:10.1007/978-0-387-35561-0_19 fatcat:a37qrz324veopayxboi6utey6q

A Uniform Approach to Inter-model Transformations [chapter]

Peter McBrien, Alexandra Poulovassilis
1999 Lecture Notes in Computer Science  
Our approach is to define each of these data models in terms of a lower-level hypergraph-based data model.  ...  We show how such definitions can be used to automatically derive schema transformation operators for the higher-level data models.  ...  Our approach is to define a more 'elemental', low-level modelling language which is based on a hypergraph data structure together with a set of associated constraints -what we call the hypergraph data  ... 
doi:10.1007/3-540-48738-7_25 fatcat:7dys2c3zgngypnqyovkl6hgvny

A novel heterogeneous data integration approach for p2p semantic link network

Hai Zhuge, Jie Liu
2004 Alternate track papers & posters of the 13th international conference on World Wide Web - WWW Alt. '04  
This paper proposes a novel approach to integrate heterogeneous data in P2P networks.  ...  The approach includes a tool for building P2P semantic link networks, mechanisms for peer schema mapping, criteria for peer similarity degree measurement, and algorithms for heterogeneous data integration  ...  Peers can dynamically establish connection and provide data and services to each other based on basic communication mechanisms.  ... 
doi:10.1145/1010432.1010527 fatcat:jmwemz6hqjcvhetyrxmuwzucju

Descriptive Schema: Semantics-based Query Answering

Sau Dan Lee, Patrick Yee, Thomas Y. Lee, David Wai-Lok Cheung, Wenjun Yuan
2008 Semantic Wiki Workshop  
Rather, it is just a probabilistic description of the structure. When answering keyword queries, DS can be used to improve semantics-based query answering and result ranking.  ...  We propose the novel concept of "descriptive schema" (DS). Unlike ordinary database schemas, a DS does not restrict the structure of the underlying database.  ...  We attempt to strike a balance between the ease of use of a schema-less approach and the high accuracy that a schema-based system can bring us.  ... 
dblp:conf/semwiki/LeeYLCY08 fatcat:e6wasjqtgvesxdug5x47euhqhm

An XML-based, 3-tier scheme for integrating heterogeneous information sources to the WWW

C. Petrou, S. Hadjiefthymiades, D. Martakos
1999 Proceedings. Tenth International Workshop on Database and Expert Systems Applications. DEXA 99  
The phenomenal growth that the WWW currently experiences necessitates the integration of various types of information sources to its platform.  ...  We also specify a series of protocols for achieving the synergy between a number of server-and client-side components.  ...  In the majority of these approaches, a hierarchical document model is proposed [2] , [3] , [4] along with a query language for retrieving and combining results even from multimedia sources [5] ,  ... 
doi:10.1109/dexa.1999.795270 dblp:conf/dexaw/PetrouHM99 fatcat:xksa7txyfrfbpo6e7wdjnpckne

An Introduction to the e-XML Data Integration Suite [chapter]

Georges Gardarin, Antoine Mensch, Anthony Tomasic
2002 Lecture Notes in Computer Science  
This paper describes the e-XML component suite, a modular product for integrating heterogeneous data sources under an XML schema and querying in real-time the integrated information using XQuery, the emerging  ...  We describe the two main components of the suite, i.e., the repository for warehousing XML and the mediator for distributed query processing. We also discuss some typical applications.  ...  Currently, as the WWW is HTML-based, search engines are based on information retrieval technology that provides a fairly "flat" interpretation of the WWW.  ... 
doi:10.1007/3-540-45876-x_20 fatcat:5u7au6r5gjhi3ouaksrehi5imu

Exploiting conceptual modeling for web application quality evaluation

P. Fraternali, P. L. Lanzi, M. Matera, A. Maurino
2004 Alternate track papers & posters of the 13th international conference on World Wide Web - WWW Alt. '04  
This paper presents an approach and a toolset for exploiting the benefits of conceptual modeling in the quality evaluation tasks that take place both before the deployment and during the operational life  ...  of a Web application.  ...  A content unit is a component for the publication of information inside a page and it corresponding to a parameterized query over the underlying E/R data model.  ... 
doi:10.1145/1010432.1010531 fatcat:xj4tyrtwpffslc3faruy2actim

Flexible and scalable digital library search

Henk Ernst Blok, Menzo Windhouwer, Roelof van Zwol, Milan Petkovic, Peter M. G. Apers, Martin L. Kersten, Willem Jonker
2001 Very Large Data Bases Conference  
Related publications from the University of Twente and CWI may be found at and respectively.  ...  More general, it provides an approach for (1) modeling webdata, (2) meta-data extraction and multimedia indexing, and (3) query formulation over a document collection, i.e. a webspace, based on an object-oriented  ...  Moreover, from a modeling point of view, the topics dealt with on the Internet are too diverse to capture (model) in a database schema.  ... 
dblp:conf/vldb/BlokWZPAKJ01 fatcat:2olxtbockzehrp7dkedepm6yki

BioDataServer: an Applied Molecular Biological Data Integration Service [chapter]

Sören Balko, Matthias Lange, Roland Schnee, Uwe Scholz
2004 Lecture Notes in Computer Science  
Due to the fact that this data complements and completes each other, it is desirable to gain a global view on the integrated databases instead of browsing each single data source itself.  ...  Within this paper, we introduce our own approach called "BioDataServer" which is a user-adaptable integration, storage, analysis and query service for molecular biological data targeted at commercial customers  ...  Our integration approach introduces the concept of so-called attribute sets to model the remote data schemas in a common way.  ... 
doi:10.1007/978-3-540-24745-6_10 fatcat:qiavrf5bm5behptblheioe7mii

Database techniques for the World-Wide Web

Daniela Florescu, Alon Levy, Alberto Mendelzon
1998 SIGMOD record  
a k eley, N i c k Kushmerick, Bertram Lud ascher, C.  ...  Acknowledgements The authors are grateful to the following colleagues who provided suggestions and comments on earlier versions of this paper: Serge Abiteboul, Gustavo Arocena, Paolo Atzeni, Jos e B l  ...  Its data model is based on the entity-relationship model the \access schema" speci es how the hyperbase is navigated and accessed in a b r o wsable site and the \presentation schema" speci es how objects  ... 
doi:10.1145/290593.290605 fatcat:sn73hqmulvdkzc3p33fygnj2ca

Performance evaluation on structural mapping choices for data-centric XML documents

Su-Cheng Haw, Emyliana Soong
2020 Indonesian Journal of Electrical Engineering and Computer Science  
The two mapping strategies are structural-based and model-based.  ...  The structural-based mapping involves the presence of Data Type Definition (DTD) for schema mapping while the model-based mapping does not require the present of DTD or any schema for the mapping purpose  ...  The two main mapping approaches are structural-based mapping (schema-based mapping) and model-based mapping (schema-less mapping) [3] .  ... 
doi:10.11591/ijeecs.v18.i3.pp1539-1550 fatcat:kvn7n44nrzghlkv6gpkus3wjdy

Web Warehousing: Design and Issues [chapter]

S. S. Bhowmick, S. K. Madria, W.-K. Ng, E. P. Lim
1999 Lecture Notes in Computer Science  
To manage and access heterogeneous information on WWW, we have started a project of building a web warehouse, called WHOWEDA (Warehouse of Web Data).  ...  Currently, our work on building a web warehousing system has focused on building a data model and designing a web algebra.  ...  These languages adopt a lightweight data model (based on labeled graphs) to represent data, and concentrate on the development of powerful query languages for these structures.  ... 
doi:10.1007/978-3-540-49121-7_8 fatcat:enldrgzk5jfqfagx2ii6anv52a

Semantic Approaches to Structuring and Querying Web Sites [chapter]

E. Damiani, L. Tanca
1998 Data Mining and Reverse Engineering  
The data model is based on WG-Iog, a query language based on the graphoriented database model of GOOD (Gyssens et al. 1997) and G-Iog (Paredaens et al. 1995) , which allows the description of data manipulation  ...  Many approaches try to compensate for the lack of such a common model by considering the hypertextual structure of Web sites; unfortunately, this structure has usually little to do with data semantics.  ...  We also like to thank the students Michele Baldi and Fabio Insaccanebbia, from the University of Verona, for their contribution to the design and development of the Schema Robot as a part of their Master's  ... 
doi:10.1007/978-0-387-35300-5_2 fatcat:xxleokwycbfxjgao6zoygxgc24

Using Webspaces to Model Document Collections on the Web [chapter]

Roelof Van Zwol, Peter M. G. Apers
2000 Lecture Notes in Computer Science  
This article describes the webspace method for modelling the content of a collection of a domain specific documents, and offers a solution for the above mentioned problems.  ...  Modelling data on the web, as if it was designed for use within databases, provides us with the necessary basis for enhancing the query formulation.  ...  Acknowledgements We wish to thank Arjen de Vries and Erik van het Hof for their work on content-based multimedia databases.  ... 
doi:10.1007/3-540-45394-6_10 fatcat:7gy6mzk7sbaj3md6b6ztx5kuiy

The webspace method

Roelof van Zwol, Peter M. G. Apers
2000 Proceedings of the ninth international conference on Information and knowledge management - CIKM '00  
By modelling these concepts using a webspace schema a semantical level of abstraction is gained. This supplies the necessary platform for querying data available within a specific webspace.  ...  Keywords Modelling data on the web, concept-based search, content-based information retrieval, daemon data dictionary.  ...  We have chosen not to follow that approach but instead an object-oriented approach to model such data.  ... 
doi:10.1145/354756.354851 dblp:conf/cikm/ZwolA00 fatcat:bvvlrfsfyvf4xa76nn2p4fefva
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