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Relational Databases in RDF: Keys and Foreign Keys
[chapter]
Lecture Notes in Computer Science
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In this paper, we discuss several possible ways to map relational databases into an RDF graph. ...
We discuss the problem of how to represent the original key and foreign key constraints in the resulting RDF graph and demonstrate, that different kinds of mappings require different solutions. ...
I wish to thank Wolfgang May and Michael Schmidt for their insightful comments on this paper. ...
doi:10.1007/978-3-540-70960-2_3
fatcat:voseagwswrhzhpeyljbekxlcuy
Sparql query processing in relational databases
2018
International Journal of Engineering & Technology
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Both the relationships in ER model and predicates in RDF model describe the relations between things.Since RDB and RDF share the similar modeling approach at the schema level, it is reasonable that mapping ...
This paper shows how to implement SPARQL endpoint in RDB using a conceptual level mapping approach.Methods/Statistical analysis: Many diverse approaches and related languages for mapping RDB to RDF have ...
Entity predicates are the ordinary column names in relational table, which are neither primary key nor foreign key such as "name", "age" and "phone". Self-Link Predicate. ...
doi:10.14419/ijet.v7i2.33.13860
fatcat:xoolr2gxdjfhvpka4wjrbzerj4
SPARQLing constraints for RDF
2008
Proceedings of the 11th international conference on Extending database technology Advances in database technology - EDBT '08
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In contrast to relational databases, where data relationships are implicitly given by schema information as well as primary and foreign key constraints, relationships in semantic markup languages are made ...
As an improvement over existing approaches, our scheme allows for translating conventional databases into RDF without losing general constraints and vital key information. ...
RELATED WORK Relational Databases and RDF. Relational databases are typically used in the context of RDF as a back end to store the RDF-statements, e.g. in Jena [14] and Sesame [28] . ...
doi:10.1145/1352431.1352492
fatcat:jeslpc6xpnbdjhtvpo7d6x5aca
SPARQLing constraints for RDF
2008
Proceedings of the 11th international conference on Extending database technology Advances in database technology - EDBT '08
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In contrast to relational databases, where data relationships are implicitly given by schema information as well as primary and foreign key constraints, relationships in semantic markup languages are made ...
As an improvement over existing approaches, our scheme allows for translating conventional databases into RDF without losing general constraints and vital key information. ...
RELATED WORK Relational Databases and RDF. Relational databases are typically used in the context of RDF as a back end to store the RDF-statements, e.g. in Jena [14] and Sesame [28] . ...
doi:10.1145/1353343.1353404
dblp:conf/edbt/LausenMS08
fatcat:njfbgiusrzb2ziognbnijqin4a
Relational Databases as Semantic Web Endpoints
[chapter]
2009
Lecture Notes in Computer Science
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This proposal explores the promotion of existing relational databases to Semantic Web Endpoints. ...
It presents the benefits of ontology-based read and write access to existing relational data as well as the need for specialized, scalable reasoning over that data. ...
(e.g. primary keys, foreign key relationships, etc.). ...
doi:10.1007/978-3-642-02121-3_84
fatcat:mncx3ldjvfc5nbtajfrbe6migi
On-demand RDF to relational query translation in Samizdat RDF store
2009
2009 IEEE International Conference on Intelligent Computing and Intelligent Systems
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Query capabilities implemented by the algorithm include optional and negative graph patterns, nested sub-patterns, and limited RDFS and OWL inference backed by database triggers. ...
and arbitrary RDF triples with a performance comparable to that of relational systems. ...
The adaptation process involves adding attributes, foreign keys, tables, and triggers to the database to enable RDF query translation and support optional features of Samizdat RDF store, such as statement ...
doi:10.1109/icicisys.2009.5358140
fatcat:zecmmiqh7fahdhj5glm4tgt5ju
Accessing and Documenting Relational Databases through OWL Ontologies
[chapter]
2009
Lecture Notes in Computer Science
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Relational databases have been designed to store high volumes of data and to provide an efficient query interface. ...
The goal of this work is to bridge the relational and ontological worlds, in order to leverage the efficiency and scalability of relational technologies and the high level view of data and metadata proper ...
in the Field of Science and Technology between Italy and the United States of America for the years (2008-2010). ...
doi:10.1007/978-3-642-04957-6_37
fatcat:w7fxmjlfjjcflf2vsfpxc5ifgq
Transformation of a Relational Database to RDF/RDFS with ER2iDM
2013
IEICE transactions on information and systems
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Web using database stored data. key words: Semantic Web, relational data model, relational database, RDF/RDFS ...
But most web data is not available in RDF/RDFS documents because most web data is still stored in databases. It is much more favorable to use stored data in a database to build the Semantic Web. ...
The ResourcePredicate is composed of three attributes, which all are foreign keys from the Resource and Predicate. ...
doi:10.1587/transinf.e96.d.1478
fatcat:fjaqnvxp2jc4rnurrfar5yo3n4
Semantic query in a relational database using a local ontology construction
2012
South African Journal of Science
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Acknowledgements
Competing interests We declare that we have no financial or personal relationships which may have inappropriately influenced us in writing this paper. ...
The parent class (class-1) is defined as a range class for the related object property in order to have each foreign key value mapped to a common object property. ...
system, making querying such data very difficult. 4 Other systems transform the ontology data into RDF form and store the RDF triples (the subject-predicate-object statements) in a relational database ...
doi:10.4102/sajs.v108i11/12.1107
fatcat:uqqzvzjzqrhtrpssp73wfbct34
Semantic - Based Querying Using Ontology in Relational Database of Library Management System
2011
International journal of Web & Semantic Technology
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The traditional Web stores huge amount of data in the form of Relational Databases (RDB) as it is good at storing objects and relationships between them. ...
In this paper we consider the Library Management System (LMS) database, taking some tuples of the LMS Relational Schema. ...
RDF
Knowledge
Modeling
Table 3 : 3 A Relational Database for the Library Management System Relation
Primary Key
Foreign Key
Book(Bid,Title,Author,Price,Status,Mid,Pid) Bid
Mid ref. to Member ...
doi:10.5121/ijwest.2011.2402
fatcat:ssqcf4dnzzecblwi2mlnltoqgy
D2RQ Platform – Treating Non-RDF Databases as Virtual RDF Graphs
2011
Nature Precedings
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DB into Semantic Web
What is needed
• A way to map between the relational data model and RDF
-Data Model heterogeneity
» relations vs. ...
Inference
Support for Named Graphs
Radoslaw Oldakowski
D2RQ Mapping Language Specification
Declarative language for describing the relations of
a relational database schema and RDFS
vocabularies ...
doi:10.1038/npre.2011.5660.1
fatcat:xdarzx2ca5fujcze2t7xmxsdnu
Cohabitation of Relational Databases and Domain Ontologies in the Semantic Web Context
2018
Journal of Systems Integration
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This paper aims to bridge the gap between ontologies and databases in the context of the Semantic Web by highlighting their advantages and disadvantages, their complementarity, and the most popular means ...
Despite the fact that database technology is mature, it is not yet compatible with Semantic Web requirements, such as Semantic Web language concordance. ...
o
Foreign key constraint: A foreign key of ...
doi:10.20470/jsi.v9i1.334
fatcat:2mw64w4ecbhprogngqrh5745mi
Htab2RDF: Mapping HTML Tables to RDF Triples
2017
Computing and informatics
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A significant number of Web documents include HTML tables generated dynamically from relational databases. Often, there is no direct public access to the databases themselves. ...
To allow direct access to data on the Web as Linked Data, we propose in this paper an approach to transform HTML tables into RDF triples. ...
A Direct Mapping from relational data to RDF has been presented in [1] . It takes as input a relational database (schema and data), and produces an RDF graph called the direct graph. ...
doi:10.4149/cai_2017_6_1467
fatcat:ncjdocckqrehfmb5wtngklwhj4
An Approach for Automatically Generating R2RML-Based Direct Mapping from Relational Databases
[chapter]
2016
Communications in Computer and Information Science
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The R2RML mapping reflects the behavior of the DM specification and allows any R2RML parser to generate a set of RDF triples from relational data. ...
For integrating relational databases (RDBs) into semantic web applications, the W3C RDB2RDF Working Group recommended two approaches, Direct Mapping (DM) and R2RML. ...
key (UK), and/or foreign key (FK). ...
doi:10.1007/978-981-10-2053-7_15
fatcat:l7hu77rxpjhgto5irhdygdnjsy
Different RDB to RDF mapping languages
2014
International Journal of Computer Applications Technology and Research
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and a conceptual gap is to be bridged between the Relational Database model and RDF to make this data available on web semantic.Many mapping languages and approaches have been found leading to the ongoing ...
standardization of the World WideWeb Consortium(W3C) carried out in the RDB2RDF Working Group(WG).This paper would provide help and recommendations for selecting a mapping language. ...
,monotone and query preserving only when relational databases contain null values.But unfortunately we found that no monotone direct mapping is semantic preserving if foreign keys are considered. ...
doi:10.7753/ijcatr0306.1011
fatcat:tfciv4tijzhrfgs6nrv6kvm2su
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