Timo Niemi

37 papers A* 3Journal 34
YearRankTypeTitle / Venue / Authors
2015 J jnl
A visual XML dataspace approach for satisfying ad hoc information needs.
J. Assoc. Inf. Sci. Technol.
Katja Moilanen, Timo Niemi, Turkka Näppilä, Mikko Kuru
2014 J jnl
Concept-based query language approach to enterprise information systems.
Enterp. Inf. Syst.
Timo Niemi, Marko Junkkari, Kalervo Järvelin
2012 J jnl
An approach for developing a schemaless XML dataspace profiling system.
J. Inf. Sci.
Turkka Näppilä, Timo Niemi
2011 J jnl
A query language for selecting, harmonizing, and aggregating heterogeneous XML data.
Int. J. Web Inf. Syst.
Turkka Näppilä, Katja Moilanen, Timo Niemi
2010 J jnl
Derived types in semantic association discovery.
J. Intell. Inf. Syst.
Janne Jämsen, Timo Niemi, Kalervo Järvelin
2009 J jnl
A relational data harmonization approach to XML.
J. Inf. Sci.
Timo Niemi, Turkka Näppilä, Kalervo Järvelin
2008 J jnl
A tool for data cube construction from structurally heterogeneous XML documents.
J. Assoc. Inf. Sci. Technol.
Turkka Näppilä, Kalervo Järvelin, Timo Niemi
2007 J jnl
A query language for discovering semantic associations, Part I: Approach and formal definition of query primitives.
J. Assoc. Inf. Sci. Technol.
Timo Niemi, Janne Jämsen
2007 J jnl
A query language for discovering semantic associations, Part II: sample queries and query evaluation.
J. Assoc. Inf. Sci. Technol.
Timo Niemi, Janne Jämsen
2004 J jnl
Advanced query language for manipulating complex entities.
Inf. Process. Manag.
Timo Niemi, Marko Junkkari, Kalervo Järvelin, Samu Viita
2003 J jnl
Multidimensional Data Model and Query Language for Informetrics.
J. Assoc. Inf. Sci. Technol.
Timo Niemi, Lasse Hirvonen, Kalervo Järvelin
2002 J jnl
Relational Deductive Object-Oriented Modeling (RDOOM) Approach for Finding, Representing and Integrating Application-Specific Concepts.
Int. J. Softw. Eng. Knowl. Eng.
Timo Niemi, Marko Junkkari, Kalervo Järvelin
2001 J jnl
ExpansionTool: Concept-Based Query Expansion and Construction.
Inf. Retr.
Kalervo Järvelin, Jaana Kekäläinen, Timo Niemi
2000 J jnl
A user-oriented interface for generalised informetric analysis based on applying advanced data modelling techniques.
J. Documentation
Kalervo Järvelin, Peter Ingwersen, Timo Niemi
2000 J jnl
Query language approach based on the deductive object-oriented database paradigm.
Inf. Softw. Technol.
Timo Niemi, M. Christensen, Kalervo Järvelin
2000 J jnl
The visual query language CQL for transitive and relational computation.
Data Knowl. Eng.
Kalervo Järvelin, Timo Niemi, Airi Salminen
1999 J jnl
Integration of complex objects and transitive relationships for information retrieval.
Inf. Process. Manag.
Kalervo Järvelin, Timo Niemi
1996 A* conf
A Deductive Data Model for Query Expansion.
SIGIR
Kalervo Järvelin, Jaana Kristensen, Timo Niemi, Eero Sormunen, Heikki Keskustalo
1996 J jnl
The processing strategy for the NF
Inf. Softw. Technol.
Timo Niemi, Kalervo Järvelin
1995 J jnl
A Straightforward NF² Relational Interface with Applications in Information Retrieval.
Inf. Process. Manag.
Timo Niemi, Kalervo Järvelin
1995 A* conf
An NF
SIGIR
Kalervo Järvelin, Timo Niemi
1993 J jnl
An Entity-Based Approach to Query Processing in Relational Databases. Part I: Entity Type Representation.
Data Knowl. Eng.
Kalervo Järvelin, Timo Niemi
1993 J jnl
An Entity-Based Approach to Query Processing in Relational Databases. Part II: Entity Query Construction and Updating.
Data Knowl. Eng.
Kalervo Järvelin, Timo Niemi
1993 J jnl
Deductive Information Retrieval Based on Classifications.
J. Am. Soc. Inf. Sci.
Kalervo Järvelin, Timo Niemi
1992 J jnl
Advanced Query Formulation in Deductive Databases.
Inf. Process. Manag.
Timo Niemi, Kalervo Järvelin
1992 J jnl
Operation-oriented query language approach for recursive queries - Part 1. Functional definition.
Inf. Syst.
Timo Niemi, Kalervo Järvelin
1992 J jnl
Operation-oriented query language approach for recursive queries - Part 2. Prototype implementation and its integration with relational databases.
Inf. Syst.
Timo Niemi, Kalervo Järvelin
1991 A* conf
Advanced Retrieval From Heterogeneous Fact Databases: Integration of Data Retrieval, Conversion, Aggregation and Deductive Techniques.
SIGIR
Kalervo Järvelin, Timo Niemi
1991 J jnl
Prolog-Based Meta-Rules For Relational Database Representation and Manipulation.
IEEE Trans. Software Eng.
Timo Niemi, Kalervo Järvelin
1988 J jnl
An approach and its specification to data reformatting in data conversion.
Inf. Syst.
Timo Niemi
1987 J jnl
Advanced tools for data conversion and database cost modelling.
Inf. Manag.
Kalervo Järvelin, Timo Niemi
1985 J jnl
Straightforward formalization of the relational model.
Inf. Syst.
Timo Niemi, Kalervo Järvelin
1984 J jnl
A Straightforward Formalization of the Relational Model.
SIGMOD Rec.
Timo Niemi, Kalervo Järvelin
1984 J jnl
Specification of a Query Language by the Attribute Method.
BIT
Timo Niemi
1984 J jnl
Specification of data restructuring software based on the attribute method.
Int. J. Parallel Program.
Timo Niemi
1983 J jnl
A seven-tuple representation for hierarchical data structures.
Inf. Syst.
Timo Niemi
1983 J jnl
Formal restructuring functions for hierarchical data bases.
Int. J. Parallel Program.
Timo Niemi