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Limits of Schema Mappings

Phokion G. Kolaitis, Reinhard Pichler, Emanuel Sallinger, Vadim Savenkov
2017 Theory of Computing Systems  
We obtain a number of results about the limits of sequences of GAV schema mappings and the limits of sequences of LAV schema mappings that reveal striking differences between these two classes of schema  ...  We also consider the completion of the metric space of sets of target instances and obtain concrete representations of limits of sequences of schema mappings in terms of generalized schema mappings, that  ...  of schema mappings.  ... 
doi:10.1007/s00224-017-9812-7 pmid:31258388 pmcid:PMC6560830 fatcat:htvha7i4czddjicye72v5c4ex4

Reverse-engineering of XML Schemas: A Survey

Jakub Klímek, Martin Necaský
2010 Databases, Texts, Specifications, Objects  
Some methods for reverse-engineering of XML schemas have been proposed and in this paper, they are compared using various criteria such as used XML schema languages, level of user involvement, number of  ...  They make the management of XML schemas easier as well as provide means for accomplishing integration of various XML data sources.  ...  This approach supports semi-automatic mapping of multiple schemas to a model which is a PSM. It preserves no mapping between the PSM and the DTDs. It is limited to DTD only.  ... 
dblp:conf/dateso/KlimekN10 fatcat:nt57w67z5vbixijuzwryq7g5hy

Mapping XML instances

Sai Anand, Erik Wilde
2005 Special interest tracks and posters of the 14th international conference on World Wide Web - WWW '05  
We present a case study of the problem that arises in an XML based project, which involves mapping of different XML schemas to each other.  ...  We describe our approach to solving the problem, its advantages and limitations.  ...  The parentheses around a tick mark () indicate that the mapping is handled in a limited sense.  ... 
doi:10.1145/1062745.1062782 dblp:conf/www/AnandW05 fatcat:ldgerijscjccvmirsfzmnzfhlm

Generating Python Code from Object-Z Specifications

Al Azzawi A.F, Bettaz M, Al-Refai H. M
2017 International Journal of Software Engineering & Applications  
There are a number of existing works that mapped Object-Z to C++ and Java programming languages.  ...  as collections of objects.  ...  This state schema will mapped to: @inv(lambda:balance +limit>=0) class CreditCard: balance=Z … where Z a function with a precondition to ensure if the constant is of type integer and greater than or equal  ... 
doi:10.5121/ijsea.2017.8401 fatcat:hcan2sjztzboncxrkkitqmcr6e

DYNAMERGE: A MERGING ALGORITHM FOR STRUCTURED DATA INTEGRATION ON THE WEB

FRANÇOIS SCHARFFE
2007 Advances in Scalable Web Information Integration and Service  
Based on a network of schemas (database schemas, ontologies) related via mappings our algorithm generates a global view over a set of resources.  ...  Integration systems proposed in the last two decades as a solution start showing some limitations for various reasons.  ...  While the federated approaches were adapted for the integration of a limited number of data sources in a close environment, they have started to show limitations in the open environment the web constitutes  ... 
doi:10.1142/9789812770240_0009 fatcat:kpdrh4dusnfmnaczwhdbviytiq

Ontology-driven mapping of temporal data in biomedical databases

Preetha S Narayanan, Martin J O'Connor, Amar K Das
2006 AMIA Annual Symposium Proceedings  
We discuss the design of Synchronus, which consists of a schema-mapping ontology and a data-mapping algorithm that together provide general capabilities for database transformation.  ...  We address this problem in implementing Synchronus, a tool for ontology-driven mapping of data from an existing relational database to a database schema with a uniform temporal representation.  ...  conceptual mapping of the two schemas.  ... 
pmid:17238664 pmcid:PMC1839378 fatcat:33qujytktffnxp4bkoitg2xaxy

A Vocabulary-Independent Generation Framework for DBpedia and Beyond

Ben De Meester, Anastasia Dimou, Wouter Maroy, Dimitris Kontokostas, Ruben Verborgh, Jens Lehmann, Erik Mannens, Sebastian Hellmann
2017 International Semantic Web Conference  
The dbpedia Extraction Framework, the generation framework behind one of the Linked Open Data cloud's central hubs, has limitations which lead to quality issues with the dbpedia dataset.  ...  This way, among others, interchanging different schema annotations is supported, instead of being coupled to a certain ontology as it is now, because the dbpedia Extraction Framework allows only generating  ...  the schema of the resulting data.  ... 
dblp:conf/semweb/MeesterDMKVLMH17 fatcat:hrze7ckjwngarjrw4ys77xp5ey

SPIDER: a Schema mapPIng DEbuggeR

Bogdan Alexe, Laura Chiticariu, Wang Chiew Tan
2006 Very Large Data Bases Conference  
At the heart of SPIDER is a data-driven facility for understanding a schema mapping through the display of routes.  ...  A schema mapping is a high-level declarative specification of how data structured under one schema, called the source schema, is to be transformed into data structured under a possibly different schema  ...  Our schema mapping example We use the nested relational model and mapping language of [6] for describing our schema mapping (see Figure 1 ).  ... 
dblp:conf/vldb/AlexeCT06 fatcat:eswlw7e7vrgubpvuayslyuetu4

Integrated Data Mapping for a Software Meta-tool

Jun Huh, John Grundy, John Hosking, Karen Liu, Robert Amor
2009 2009 Australian Software Engineering Conference  
We describe Marama Torua, a tool supporting high-level specification and implementation of complex data mappings.  ...  MaramaTorua is a set of Eclipse plug-ins allowing close integration with other tools such as schema browsers, and with the Marama meta-tool itself.  ...  Our experience is that semi-automated mapping agents can greatly assist translator authors but must be limited to subsets of schema and coupled with good schema and mapping visualization support [5] .  ... 
doi:10.1109/aswec.2009.21 dblp:conf/aswec/HuhGHLA09 fatcat:vv6dfuqzvzd2zgyikmc4fektfa

Declarative Data Transformations for Linked Data Generation: The Case of DBpedia [chapter]

Ben De Meester, Wouter Maroy, Anastasia Dimou, Ruben Verborgh, Erik Mannens
2017 Lecture Notes in Computer Science  
We employ an alignment of data transformations described using the Function Ontology (fno) and mapping of data to Linked Data described using the rdf Mapping Language (rml).  ...  Since complex data transformations remain out of scope for mapping languages, these steps are often implemented as custom solutions, or with systems separate from the mapping process.  ...  Our resulting extension of the rmlprocessor overcomes the limitations as stated in Section 3. It is capable of combining schema and data transformations.  ... 
doi:10.1007/978-3-319-58451-5_3 fatcat:aielaatqyzdxppirfkxm5s7bme

Dimensions of Dataspaces [chapter]

Cornelia Hedeler, Khalid Belhajjame, Alvaro A. A. Fernandes, Suzanne M. Embury, Norman W. Paton
2009 Lecture Notes in Computer Science  
The vision of dataspaces has been articulated as providing various of the benefits of classical data integration, but with reduced upfront costs, combined with opportunities for incremental refinement,  ...  With a view to clarifying the key concepts in the area, encouraging the use of consistent terminology, and enabling systematic comparison of proposals, this paper defines a collection of dimensions that  ...  Providing this illusion typically involves the development of a single central schema to which the schemas of individual resources are related using some form of mapping.  ... 
doi:10.1007/978-3-642-02843-4_8 fatcat:lyz5ks3anzh73e5vn5c6dhgaba

Ontology-Based Data Access Mapping Generation Using Data, Schema, Query, and Mapping Knowledge [chapter]

Pieter Heyvaert, Anastasia Dimou, Ruben Verborgh, Erik Mannens
2017 Lecture Notes in Computer Science  
While a number of these tools use knowledge from the original data, existing Linked Data, schemas, and/or mappings, they still fall short when dealing with complex challenges and the user effort can be  ...  In this paper, we propose an approach, together with an evaluation, that discovers and uses extended knowledge from existing (Linked) Data, schemas, query workload, and mappings, and combines it with knowledge  ...  The use of mapping process knowledge in the tools is limited to either the original data, schema and/or ontology, while the query workload is neglected.  ... 
doi:10.1007/978-3-319-58451-5_15 fatcat:jbnzkvj7xffxfoyijtd34dsyde

Supporting Geosciences Web Services Metadata Management and Discovery

Pearl Brazier, Artem Chebotko, Eric Gonzalez, Andrey Kashlev, Anthony Piazza
2010 2010 IEEE International Conference on Services Computing  
The problem with most of these systems is that their query performance is limited by the use of fixed schema mapping strategies.  ...  This project uses SPARQL, the W3C standard for querying RDF, to support discovery of web services.  ...  The data loading and query performance of existing systems is limited due to fixed database schemas.  ... 
doi:10.1109/scc.2010.27 dblp:conf/IEEEscc/BrazierCGKP10 fatcat:zgjxrujdwjgx3npi3yvuv3mnhm

Demonstration of a Multiresolution Schema Mapping System [article]

Zhongjun Jin, Christopher Baik, Michael Cafarella, H. V. Jagadish, Yuze Lou
2018 arXiv   pre-print
The end user is not limited to providing high-resolution constraints like exact data records but may also provide constraints of various resolutions, like incomplete data records, value ranges, and data  ...  Sample-driven schema mapping allows the user to describe the schema mapping using data records.  ...  Our Approach -To address the above limitations of sample-driven schema mapping, we developed Prism 1 , a multiresolution schema mapping system, that can discover schema mapping queries employing user insights  ... 
arXiv:1812.07658v1 fatcat:72rfptm2jbccfotc2dlkeclj4a

Semantic Annotation of XML-Schema for Document Transformations [chapter]

Julius Köpke, Johann Eder
2010 Lecture Notes in Computer Science  
Creates structural dependencies between schema and ontology. SAWSDL Discussion • Lifting and lowering mappings cannot be used to annotate a schema in a declarative way.  ...  elements but are limited in their expressiveness.  ... 
doi:10.1007/978-3-642-16961-8_39 fatcat:ahkikawiefg4llaf6ecxjgjb2u
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