11,451 Hits in 9.7 sec

Complete Geometric Query Languages

Marc Gyssens, Jan Van den Bussche, Dirk Van Gucht
1999 Journal of computer and system sciences (Print)  
We extend Chandra and Harel's seminal work on computable queries for relational databases to a setting in which also spatial data may bepresent, using a constraint-based data model.  ...  The languages we introduce are obtained by augmenting basic languages with a while construct.  ...  Acknowledgments The authors wish to thank Jan Paredaens and Bart Kuijpers for interesting discussions related to generic geometric queries.  ... 
doi:10.1006/jcss.1999.1630 fatcat:p5fdwonttrfcdf7f5zq5temyza

Integrating Schema-specific Native XML Repositories into a RDF-based E-Learning P2P Network

Changtao Qu, Wolfgang Nejdl, Holger Schinzel
2002 International Conference on Dublin Core and Metadata Applications  
In this paper we present our approach for integrating native XML repositories into Edutella, a RDF-based E-learning P2P network, through mapping native XML database schemas onto the Edutella Common Data  ...  Model (ECDM) and further translating ECDM's internal query language Datalog into XPath, the local query language of native XML repositories.  ...  these statements, as we believe the modular nature of RDF metadata to be especially suitable for distributed P2P settings.  ... 
dblp:conf/dc/QuNS02 fatcat:ykwmwhnphfbunfxfbh4cergcpm

A Heterogeneous Geospatial Data Retrieval Method Using Knowledge Graph

Junnan Liu, Haiyan Liu, Xiaohui Chen, Xuan Guo, Qingbo Zhao, Jia Li, Lei Kang, Jianxiang Liu
2021 Sustainability  
Then, the query expansion rules and the mappings between knowledge and database are designed to construct retrieval statements and obtain related spatial entities.  ...  Additionally, users could reduce the dependence on data storage mode and database Structured Query Language syntax.  ...  Acknowledgments: We would like to thank the anonymous reviewers for their insightful comments and substantial help on improving this article.  ... 
doi:10.3390/su13042005 fatcat:zjb362c6nrgmbm4kegtuz2mije

Fuzzy database query languages and their relational completeness theorem

Y. Takahashi
1993 IEEE Transactions on Knowledge and Data Engineering  
Two fuzzy database query languages are proposed.  ...  A fuzzy calculus query language is constructed based on the relational calculus and a fuzzy algebra query language is also constructed based on the relational algebra.  ...  It proposes two fuzzy database query languages: a fuzzy calculus query language and a fuzzy algebra query language.  ... 
doi:10.1109/69.204096 fatcat:ymk7eyqfrrasvddy7jiwoctyba

GETESS—Searching the Web Exploiting German Texts [chapter]

Steffen Staab, Christian Braun, Ilvio Bruder, Antje Düsterhöft, Andreas Heuer, Meike Klettke, Günter. Neumann, Bernd Prager, Jan Pretzel, Hans-Peter Schnurr, Rudi Studer, Hans Uszkoreit (+1 others)
1999 Lecture Notes in Computer Science  
We present an intelligent information agent that uses semantic methods and natural language processing capabilites in order to gather tourist information from the WWW and present it to the human user in  ...  Thereby, the information agent is designed such that as background knowledge and linguistic coverage increase, its benefits improve, while it guarantees state-of-the-art information and database retrieval  ...  Therefore, both inputs must be mapped onto the same query to the database.  ... 
doi:10.1007/3-540-48414-0_7 fatcat:zjwjobdpvnetdd4a4eckd7vlm4

Adaptable Support for Queries and Transformations for the DRAGOS Graph-Database [chapter]

Erhard Weinell
2008 Lecture Notes in Computer Science  
As result, the development of graph transformation tools is eased by providing a mapping of specific graph languages to the Query and Transformation Language, instead of developing interpreters or code  ...  In this paper, we extend the existing database by a basic Query and Transformation Mechanism, which facilitates the construction of graph transformation systems.  ...  This transformation step actually maps the semantics of the GTT's language onto the language of the processing engine.  ... 
doi:10.1007/978-3-540-89020-1_27 fatcat:6fagheilivfabjdqmbyqpcu5hu


Ilya Taranov, Andrey Fomichev, Peter Pleshachkov, Pavel Velikhov, Nikolai Zavaritski, Maxim Grinev, Maria Grineva, Dmitry Lizorkin, Ivan Shcheklein, Alexander Kalinin, Leonid Novak, Sergei Kuznetsov (+4 others)
2010 Proceedings of the 2010 international conference on Management of data - SIGMOD '10  
We present a native XML database management system, Sedna, which is implemented from scratch as a full-featured database management system for storing large amounts of XML data.  ...  We believe that the key contribution of this system is an improved schema-based clustering storage strategy efficient for both XML querying and updating, and powered by a novel memory management technique  ...  Support for a wide range of queries/statements: XQuery queries, XML update statements, data definition language statements. High performance for both query evaluation and updates execution.  ... 
doi:10.1145/1807167.1807282 dblp:conf/sigmod/TaranovSKNKPBTAFPVZGGL10 fatcat:jqgvtgff3jfkvdiayrmjcchs3u

Extending RDF in distributed knowledge-intensive applications

Jun Shen, Yun Yang
2004 Future generations computer systems  
The resource description framework (RDF) has become a formal language tool to specify the semantics of distributed systems, such as web services nowadays.  ...  This paper presents two case studies on a network management knowledge model and a distributed workflow system process ontology.  ...  We are also grateful for many members of CICEC for constructive discussions.  ... 
doi:10.1016/s0167-739x(03)00163-8 fatcat:wz2ft3afubbyzgn67mu6ayxoki

Object-oriented querying of existing relational databases [chapter]

Daniel A. Keim, Hans-Peter Kriegel, Andreas Miethsam
1993 Lecture Notes in Computer Science  
Viewpoints -Facilitating Expert Systems for Multiple Users FINCH I. Improving Shafer-Logan's Algorithm for Handling Hierarchical Evidence GUANJ.  ...  To query the created schema, we provide the Structured Object Query Language (SOQL), a declarative language for querying object-oriented databases.  ...  to a query language which is only useful for simple ad hoc queries.  ... 
doi:10.1007/3-540-57234-1_29 fatcat:au5svceiczbalfrwdmgdgnk6qe

Managing Schema Evolution in NoSQL Data Stores [article]

Stefanie Scherzinger and Meike Klettke and Uta Störl
2013 arXiv   pre-print
We further provide a holistic NoSQL database programming language to define the semantics of our schema evolution language.  ...  We discuss the recommendations of the developer community on handling schema changes, and introduce a simple, declarative schema evolution language.  ...  Relational databases have an established language for schema evolution ("ALTER TABLE" ).  ... 
arXiv:1308.0514v1 fatcat:6kjvkv6wkjeppfxj73krjikyju

Algebraic and calculus query languages for recursively typed complex objects

Richard Hull, Jianwen Su
1993 Journal of computer and system sciences (Print)  
Algebraic and calculus database query languages for recursively typed complex objects based on the set and tuple constructs are studied.  ...  A technical tool, called "domain Turing machine," is introduced and applied to characterize the expressive power of several classes of relational queries.  ...  ACKNOWLEDGMENT The authors thank Dino Karabeg for stimulating discussions concerning domTMs.  ... 
doi:10.1016/0022-0000(93)90022-o fatcat:5rbtnj5ymrayxcpo2zgrcowhye

Building natural language responses from natural language questions in the spatio-temporal context

Sami Faïz, Khaoula Mahmoudi, Ghada Landoulsi
2021 International Journal of Intelligent Information and Database Systems  
The process is generally two-fold: 1) formatting the natural language user query to be processed by the GDB engine; 2) translating the GDB retrieved answer to a text easily interpreted by all GIS users  ...  In this paper we explore a new approach which alleviates nomad GIS users from any formatting effort by only using the natural language as a GDB communication mean.  ...  The main idea of our proposal is to establish mappings from a natural language query to a SQL well formatted request to alleviate the GIS users from any SQL expertise requirements.  ... 
doi:10.1504/ijiids.2021.10033770 fatcat:mganizqmvjeipdqmrhes4ti63e

Embedded grammar tags: advancing natural language interaction on the Web

G.K. Dorai, Y. Yacoob
2002 IEEE Intelligent Systems  
We believe that EGT annotation will be the basis for such a semantics. EGTs represent user queries in a general parseable format.  ...  will be able to respond to the natural language queries.  ...  T h e A u t h o r  ... 
doi:10.1109/5254.988450 fatcat:s5muxprmorfsneepo7yyxi42rq

Anatomy of the ADO.NET entity framework

Atul Adya, José A. Blakeley, Sergey Melnik, S. Muralidhar
2007 Proceedings of the 2007 ACM SIGMOD international conference on Management of data - SIGMOD '07  
The mappings between the database and applications are expressed in a custom structure, or via schema annotations.  ...  Traditional client-server applications relegate query and persistence operations on their data to database systems.  ...  The ADO.NET Entity Framework is a large team effort. We would like to thank all members of the ADO. NET  ... 
doi:10.1145/1247480.1247580 dblp:conf/sigmod/AdyaBMM07 fatcat:pffnelzhevam5ecbwnhgpngvci

A Semantic Similarity Measure for Ontology-Based Information [chapter]

Heiner Stuckenschmidt
2009 Lecture Notes in Computer Science  
In this paper, we propose a similarity measure for data described in terms of the DL-lite ontology language.  ...  Computing the similarity between data elements is a basic functionality in flexible query answering systems.  ...  The semantic nature of the measures makes it an ideal basis for improving semantic matching methods for heterogeneous ontologies and conceptual schemas.  ... 
doi:10.1007/978-3-642-04957-6_35 fatcat:kooacjqpandqdilrdufvt2vk6q
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