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Automatic Extraction of Ontologies Wrapping Relational Data Sources [chapter]

Lina Lubyte, Sergio Tessaris
2009 Lecture Notes in Computer Science  
Relational schema with constraints.  ...  To this purpose we are starting to experiment with real database schemas to evaluate the quality of the extracted ontologies.  ...  Our extraction procedure relies on information from the database schema and automatically extracts all the relevant semantics if an input relational schema was designed using a standard methodology.  ... 
doi:10.1007/978-3-642-03573-9_10 fatcat:tv6qpizqsjdjvmh43dkcrxjysi

A Semantic Portal for the International Affairs Sector [chapter]

J. Contreras, V. R Benjamins, M Blázquez, S Losada, R Salla, J Sevilla, D. Navarro, J. Casillas, A. Mompó, D. Patón, O. Corcho, P. Tena (+1 others)
2004 Lecture Notes in Computer Science  
The approach comprises an automatic ontology-based annotator, a semantic search engine with a natural language interface, a web publication tool allowing semantic navigation, and a 3D visualization component  ...  We describe an approach, tools and techniques that allow building a semantic portal, where access is based on the meaning of concepts and relations of the International Affairs domain.  ...  The wrapping ontology contains the following elements: • Document Types: Description of document types in the source.  ... 
doi:10.1007/978-3-540-30202-5_14 fatcat:q7gitr6btvf7ngwjwjyngh6bpe

Integrating External Sources in a Corporate Semantic Web Managed by a Multi-agent System [chapter]

Tuan-Dung Cao, Fabien Gandon
2004 Lecture Notes in Computer Science  
We then focus on a newly introduced society of agents in charge of wrapping external HTML documents that are relevant to the activities of the organization, by extracting semantic Web annotations using  ...  The result of this approach is a heterogeneous and distributed information landscape, semantically annotated using the conceptual primitives provided by the ontology.  ...  To extract data from a Web page, the system needs to access the appropriate portion of data in the source document.  ... 
doi:10.1007/978-3-540-24612-1_18 fatcat:2ws5kge2ercg3duerbgemkv5ne

A Bootstrapping Method For Automatic Constructing Of The Web Ontology Instances And Properties

Song-Il CHA
2018 Zenodo  
This paper proposes bootstrapping method that can automatically construct instances and data type properties of the Web ontology, taking proper noun as semantic core element of the Web table.  ...  The machine learning methods play an important role in automatic constructing of the Web ontology.  ...  ACKNOWLEDGEMENTS This work was supported in part by the science & technology development fund of University of Sciences (100/425-63053-243/1).  ... 
doi:10.5281/zenodo.1343138 fatcat:tgo2yyq26bdclnv5i6asovee5e

Simplifying data access: the Energy Data Collection project

J.L. Ambite, Y. Arens, E. Hovy, A. Philpot, L. Gravano, V. Hatzivassiloglou, J. Klavans
2001 Computer  
The authors are grateful for the hard work and dedication of four graduate students: Usha Ramachandran at USC/ISI and Jay Sandhaus, Anurag Singla, and Brian Whitman at Columbia University.  ...  To obtain uniformity and support reasoning, SIMS models each data source, whether natively relational or wrapped by Ariadne, by associating it with an appropriate domain-level concept description.  ...  We have wrapped more than a hundred Web sources for the first stage of integration, performed research on computational properties of aggregation, and investigated how to extract information from footnotes  ... 
doi:10.1109/2.901167 fatcat:gz4ntscoqfayhd2t5esv2x2ome

A Semantic Search Engine for the International Relation Sector [chapter]

L. Rodrigo, V. R Benjamins, J. Contreras, D. Patón, D. Navarro, R. Salla, M. Blázquez, P. Tena, I. Martos
2005 Lecture Notes in Computer Science  
Topics that will be discussed include ontology construction, automatic ontology population, semantic access through a natural language interface and a failure analysis.  ...  In this paper we present and evaluate the application of a semantic search engine to improve access to the Institute's content: instead of retrieving documents based on user queries of keywords, the system  ...  For each of the sites, a wrapping ontology was developed, describing the data contained in it, the way to detect it and the relations among them.  ... 
doi:10.1007/11574620_71 fatcat:vmlav3lsufdoxlp475jbh6iire

Big Data Integration: A MongoDB Database and Modular Ontologies based Approach

Hanen Abbes, Faiez Gargouri
2016 Procedia Computer Science  
It follows three steps: wrapping data sources to MongoDB databases, generating local ontologies, composing the local ontologies to get a global one.  ...  Big Data integration is a new research area that faces new challenges due to these characteristics. Ontologies represent knowledge as a formal description of a domain of interest.  ...  Moreover, instead of defining transformation rules from each data source to the ontology formalism representation, we wrap all data sources to the same intermediary representation so that the process of  ... 
doi:10.1016/j.procs.2016.08.099 fatcat:26jjd4iygzertaachszdlzutn4

Rapidly Integrating Services into the Linked Data Cloud [chapter]

Mohsen Taheriyan, Craig A. Knoblock, Pedro Szekely, José Luis Ambite
2012 Lecture Notes in Computer Science  
The amount of data available in the Linked Data cloud continues to grow. Yet, few services consume and produce linked data.  ...  First, the user provides examples of the service request URLs. Then, the system automatically proposes a service model the user can refine interactively.  ...  The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of NSF  ... 
doi:10.1007/978-3-642-35176-1_35 fatcat:agesjgeuwzh7bj4y7kcuoloovq

Toward a Unified View of Data and Services [chapter]

Sonia Bergamaschi, Andrea Maurino
2009 Lecture Notes in Computer Science  
logics Tool-supported techniques to construct the Global Virtual View (GVV) • Local sources wrapping • Local Schema Annotation w.r.t. a common lexical ontology (WordNet) • Semi-automatic discovery  ...  Service Ontologies The Peer Virtual View (PVV) Building the Data Ontology: MOMIS MOMIS* (Mediator envirOnment for Multiple Information Sources) is a framework to perform information extraction and  ... 
doi:10.1007/978-3-642-04409-0_6 fatcat:h7zsfvk5zral3bljdwosrmufqm


2005 Information Technology & Tourism  
MOMIS, (Mediator envirOnment for Multiple Information Sources), is a mediator framework that performs information extraction and integration from heterogeneous distributed data sources and includes query  ...  management facilities to transparently support queries posed to the integrated data sources.  ...  Our XML wrapper is based on MS .net framework and automatically updates the data extracted from the web by means of script daemons into the relational database. Italian restaurant source wrapping.  ... 
doi:10.3727/109830505774297265 fatcat:j3bq2nzi2nezbfwuhhy7mrxoja

Semantic Web Service Based Geospatial Knowledge Discovery

P. Zhao, L. Di
2006 2006 IEEE International Symposium on Geoscience and Remote Sensing  
Large amount of Earth and space science data has been collecting from various sources.  ...  In this approach, domain concepts are well defined by geospatial ontology as the basic knowledge, data and data mining processes then are well described by these concepts and served by OGC Web services  ...  Data source: the type of data and its sources the data mining technique can work on. The data type is defined in data source ontology.  ... 
doi:10.1109/igarss.2006.895 fatcat:tjz6vdx7i5an7eu3owql4gdmiu

The Personal Publication Reader: Illustrating Web Data Extraction, Personalization and Reasoning for the Semantic Web [chapter]

Robert Baumgartner, Nicola Henze, Marcus Herzog
2005 Lecture Notes in Computer Science  
Our approach consists of two main parts: The web data extraction part, providing the information system with real-time, dynamic data, and the personalization part, which deduces -with the aid of ontological  ...  domain knowledge -personalized views on the data.  ...  Content syndication and personalization is achieved by reasoning about ontological knowledge and extracted Web data.  ... 
doi:10.1007/11431053_35 fatcat:ylopabnxubg3jc7m2acbnikqna

Building an Ontological Base for Experimental Evaluation of Semantic Web Applications [chapter]

Peter Bartalos, Michal Barla, György Frivolt, Michal Tvarožek, Anton Andrejko, Mária Bieliková, Pavol Návrat
2007 Lecture Notes in Computer Science  
with experimental data (i.e., instance ontologies), which can be used to evaluate methods used for information processing.  ...  We also discuss characteristics and suitability of particular approaches to the development of experimental ontological knowledge bases.  ...  process. k Maintenance cost related to adjustments to changes in the ontology or data source.  ... 
doi:10.1007/978-3-540-69507-3_59 fatcat:rgreu7owlzaepfcuxfzh3utyn4

Automatic Creation of Web Services from Extraction Ontologies [chapter]

Cui Tao, Yihong Ding, Deryle Lonsdale
2006 Lecture Notes in Computer Science  
A similar situation exists for traditional information extraction, where ontologies are increasingly used to specify information used by various extraction methods.  ...  The approach we introduce in this paper involves converting such ontologies into executable Java code. These APIs act individually or compositionally as services for Semantic Web extraction.  ...  Object Set An object set describes information about a concept in a source ontology. In our system, an interface is generated automatically for each concept in the source ontology.  ... 
doi:10.1007/11908883_49 fatcat:yzwfqbzq6vg7bjetnqfodcn2k4

WikiOnto: A System for Semi-automatic Extraction and Modeling of Ontologies Using Wikipedia XML Corpus

Lalindra Niranjan De Silva, Lakshman Jayaratne
2009 2009 IEEE International Conference on Semantic Computing  
This paper introduces WikiOnto: a system that assists in the extraction and modeling of topic ontologies in a semi-automatic manner using a preprocessed document corpus of one of the largest knowledge  ...  The initial results of the prototype suggest strong potential of the system to become highly successful in ontology extraction and modeling and also inspire further research on extracting ontologies from  ...  Onto-Gen is a tool that enables semi-automatic generation of topic ontologies using textual data as the initial source.  ... 
doi:10.1109/icsc.2009.93 dblp:conf/semco/SilvaJ09 fatcat:ts7doavlrfg43deh3zagubz2yq
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