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XML reasoning made practical

Pierre Geneves, Nabil Layaida
2010 2010 IEEE 26th International Conference on Data Engineering (ICDE 2010)  
We present a tool for the static analysis of XPath queries and XML Schemas.  ...  of real-world XML Schemas.  ...  The problem is then formulated with logical connectives; • compilers for translating schemas and queries into their logical representations [4] ; • an optimized solver for checking satisfiability of logical  ... 
doi:10.1109/icde.2010.5447786 dblp:conf/icde/GenevesL10 fatcat:euz7evgi2zcbboho44ojbvwx44

Towards data abstraction in networked information retrieval systems

Norbert Fuhr
1999 Information Processing & Management  
Uncertain inference allows for query processing even on incompatible database schemas.  ...  Physical data independence separates search operators from access paths, thus solving text search problems related to noun phrases, compound words and proper nouns.  ...  Here the queries formulated in the powerful query language of the front-end are mapped onto database-speci c formulations, which either retrieve the exact answer or a superset of it.  ... 
doi:10.1016/s0306-4573(99)00009-6 fatcat:5ki6pmuy3vgsni5sm5yl45bdzy

Towards a standard query model for sharing decision-support applications

W Sujansky, R Altman
1994 Proceedings. Symposium on Computer Applications in Medical Care  
When such applications include queries to electronic patient databases, the queries must be translated to conform to local database specifications.  ...  In this paper, we propose an abstract formalism, called the Standard Query Model Framework, for specifying a standard clinical data model and for supporting the automated and reliable translation of queries  ...  This minimal and abstract set of modeling constructs allows FER schemas to subsume query model 328 Query Formulation Figure 3. A sample FER schema.  ... 
pmid:7949944 pmcid:PMC2247927 fatcat:dfgjvlompvgaxjdycbqhn5ohvu

WDBQS: A Unified Access to Distant Databases Via a Simple Web-Tool [chapter]

Christian Sallaberry, Eric Andonoff, Nicolas Belloir
2000 Lecture Notes in Computer Science  
This system, dedicated to casual users, proposes simple Web mechanisms to navigate through database schemas, build queries and display results.  ...  This paper presents WDBQS (Web DataBase Query System); a Web-interface for querying distant Relational and Object Oriented DataBases.  ...  The WDBQL querying navigator uses the Query Definition and Validation module to display the schema of the queried remote database and to help the user when query formulation.  ... 
doi:10.1007/3-540-44469-6_76 fatcat:neufwxnimjhrjeq3inldefbdbq

The model-assisted global query system for multiple databases in distributed enterprises

Waiman Cheung, Cheng Hsu
1996 ACM Transactions on Information Systems  
Conventional technologies, such as schema-based query languages and hard-coded schema integration, are not sufficient to solve this problem.  ...  This article develops a new approach, a "model-assisted global query system," that utilizes an on-line repository of enterprise metadata-the Metadatabase-to facilitate global query formulation and processing  ...  Formulating a Nested Query. A successfully formulated global query can be kept as a run-time view by giving a unique name, which can then be recalled to formulate a nested global query.  ... 
doi:10.1145/237496.237499 fatcat:7hyfkz7fbzblnmxky6scovilfe

A Quantitative Comparison of XML Schemas for Taxonomic Publications

Guido Sautter, Klemens Böhm, Donat Agosti
2007 Biodiversity Informatics  
We have examined if they facilitate formulation and correct processing of queries that are common when it comes to taxonomic literature.  ...  We also compare the performance of these queries on documents that are marked up with the different schemas. Finally, we propose extensions to the schemas that enhance correctness of query results.  ...  All three schemas share the problem that Concept Queries cannot be formulated sufficiently exactly.  ... 
doi:10.17161/bi.v4i0.36 fatcat:hb4u25fkanfspn6libhlv5p764

NQS — a graphical query system for data models with binary relationship types [chapter]

Hans-Joachim Klein, Dirk Krämer
1995 Visual Database Systems 3  
Keywords Entity-Relationship data model, graphical user interface, visual query language, query graphs, schema layout algorithm S. Spaccapietra et al. (eds.), Visual Database Systems 3  ...  A graphical query system for data models with binary relationship types is described in which queries can be formulated as annotated graphs.  ...  Figure 1 NQS interface with a schema diagram drawn by the embedding algorithm 3 QUERY FORMULATION Query formulation in NQS means transformation of a given schema diagram into a query graph by use of graphical  ... 
doi:10.1007/978-0-387-34905-3_25 fatcat:oimczznh4naurizmcsb6hknffy

A Reuse Based Object-Oriented Framework Towards Flexible Formulation of Complex Queries [chapter]

Abdelhak Seriai, Chabane Oussalah
2001 Flexible Query Answering Systems  
them to help in the formulation of new complex queries.  ...  However, query formulation remains obstinately difficult for large classes of users.  ...  These, in contrast to the approach adopted here, don't allow the creation of separate and independent user views -don't filtrate the schema.  ... 
doi:10.1007/978-3-7908-1834-5_12 dblp:conf/fqas/SeriaiO00 fatcat:xyz3fme4fjcuhjqyezkzmczz2i

Page 313 of Mathematical Reviews Vol. , Issue 82a [page]

1982 Mathematical Reviews  
A nonprocedural representation for queries formulated by these expressions is pro- posed.  ...  “Aho and Uliman have considered the case when the proba- bility that a field is specified in a query is independent of which other fields are specified.  ... 

Architecture of a semantic data integration system based on a semantically complete model and a semantically complete query language

V. V. Ovchinnikov
2006 Programming and computer software  
The simplification of the users' work with the system is achieved due to some special properties of the semantically complete model (SCM) and of the semantically complete query language (SCQL), which provide  ...  Using these operations, practically any query on the SCM schema can be formulated.  ...  If it is required to preserve the semantics of a query independently of the context, then the query must be formulated using the association selections that refer to the associations that are included  ... 
doi:10.1134/s0361768806040050 fatcat:2h3v3cscinaolks3e64vbvazuq

An XML Schema-based Semantic Data Integration

Dongkwang Kim, Karpjoo Jeong, Hyoseop Shin, Suntae Hwang
2006 2006 Fifth International Conference on Grid and Cooperative Computing (GCC'06)  
Such data integration raises challenging issues: (1) Support for multiple independently-managed schemas, (2) Ease of schema evolution, and (3) Simple schema mappings.  ...  A simple RDF-based ontological representation scheme is used for only structural relations among independently-managed XML schemas from different institutes or domains We present the design and implementation  ...  This global layer is designed to allow the user to formulate queries without understanding those multiple schemas in detail.  ... 
doi:10.1109/gcc.2006.28 dblp:conf/gcc/KimJSH06 fatcat:vkq3ovwovjduroti2s7axwvrn4

A DHT-based infrastructure for ad-hoc integration and querying of semantic data

Marcel Karnstedt, Kai-Uwe Sattler, Manfred Hauswirth, Roman Schmidt
2008 Proceedings of the 2008 international symposium on Database engineering & applications - IDEAS '08  
We focus on the integration into efficient distributed query processing and evaluate our approach in a series of experiments.  ...  In this paper, we argue for a unified and distributed infrastructure providing a repository for semantic data by offering location transparency and advanced query services.  ...  Query Formulation This section clarifies the basic approach and highlights the tight and easy integration of schema correspondences into query formulation.  ... 
doi:10.1145/1451940.1451945 dblp:conf/ideas/KarnstedtSHS08 fatcat:3opr76jhdnb65edf3kpz35mrli

Reconsidering Multi-Dimensional schemas

Tim Martyn
2004 SIGMOD record  
The primary focus is the relevancy of Multi-Dimensional logical schemas. After enumerating the advantages of such schemas, a number of caveats to the presumed advantages are identified.  ...  Transforming a 3NF schema into a MD schema may actually obscure important semantic information necessary to formulate accurate queries.  ...  This makes it easier to formulate queries. • The typical data warehouse query gracefully maps to the star schema. • The star schema could serve as a generic logical schema for all data warehouses.  ... 
doi:10.1145/974121.974136 fatcat:b44jhd6qhncvzhsvaofeyiyg3u

SUPER — Visual interaction with an object-based ER model [chapter]

Annamaria Auddino, Yves Dennebouy, Yann Dupont, Edi Fontana, Stefano Spaccapietra, Zahir Tari
1992 Lecture Notes in Computer Science  
Visual interaction in SUPER environment is based on direct manipulation of objects and functions, providing users with maximum flexibility during schema definition as well as query formulation.  ...  An example of query formulation shows the rules used to govern interactions with users.  ...  SUPER fully supports unconstrained user behavior, both for schema editing and for query formulation.  ... 
doi:10.1007/3-540-56023-8_21 fatcat:dnekf34bs5cybps5wglbymljni

UniStore: Querying a DHT-based Universal Storage

Marcel Karnstedt, Kai-Uwe Sattler, Martin Richtarsky, Jessica Muller, Manfred Hauswirth, Roman Schmidt, Renault John
2007 2007 IEEE 23rd International Conference on Data Engineering  
Moreover, querying schema data (attributes, correspondences) has to be supported as well.  ...  The first question raises two main problems: We need a generic and flexible schema for structuring data and we have to deal with heterogeneities on schema and on data level.  ...  In order to face the challenges of data organization, we follow the idea of the universal relation model allowing schema-independent query formulation.  ... 
doi:10.1109/icde.2007.369054 dblp:conf/icde/KarnstedtSRMHSJ07 fatcat:yx5fjbhnq5a5jhxv34xyroevue
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