Timo Niemi

According to our database, Timo Niemi authored at least 36 papers between 1983 and 2015.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of five.

2015

A visual XML dataspace approach for satisfying ad hoc information needs.

Katja Moilanen, Timo Niemi, Turkka Näppilä, Mikko Kuru

J. Assoc. Inf. Sci. Technol., 2015

2014

Concept-based query language approach to enterprise information systems.

Timo Niemi, Marko Junkkari, Kalervo Järvelin

Enterp. Inf. Syst., 2014

2012

An approach for developing a schemaless XML dataspace profiling system.

Turkka Näppilä, Timo Niemi

J. Inf. Sci., 2012

2011

A query language for selecting, harmonizing, and aggregating heterogeneous XML data.

Turkka Näppilä, Katja Moilanen, Timo Niemi

Int. J. Web Inf. Syst., 2011

2010

Derived types in semantic association discovery.

Janne Jämsen, Timo Niemi, Kalervo Järvelin

J. Intell. Inf. Syst., 2010

2009

A relational data harmonization approach to XML.

Timo Niemi, Turkka Näppilä, Kalervo Järvelin

J. Inf. Sci., 2009

2008

A tool for data cube construction from structurally heterogeneous XML documents.

Turkka Näppilä, Kalervo Järvelin, Timo Niemi

J. Assoc. Inf. Sci. Technol., 2008

2007

A query language for discovering semantic associations, Part II: sample queries and query evaluation.

Timo Niemi, Janne Jämsen

J. Assoc. Inf. Sci. Technol., 2007

A query language for discovering semantic associations, Part I: Approach and formal definition of query primitives.

Timo Niemi, Janne Jämsen

J. Assoc. Inf. Sci. Technol., 2007

2004

Advanced query language for manipulating complex entities.

Timo Niemi, Marko Junkkari, Kalervo Järvelin, Samu Viita

Inf. Process. Manag., 2004

2003

Multidimensional Data Model and Query Language for Informetrics.

Timo Niemi, Lasse Hirvonen, Kalervo Järvelin

J. Assoc. Inf. Sci. Technol., 2003

2002

Relational Deductive Object-Oriented Modeling (RDOOM) Approach for Finding, Representing and Integrating Application-Specific Concepts.

Timo Niemi, Marko Junkkari, Kalervo Järvelin

Int. J. Softw. Eng. Knowl. Eng., 2002

2001

ExpansionTool: Concept-Based Query Expansion and Construction.

Kalervo Järvelin, Jaana Kekäläinen, Timo Niemi

Inf. Retr., 2001

2000

A user-oriented interface for generalised informetric analysis based on applying advanced data modelling techniques.

Kalervo Järvelin, Peter Ingwersen, Timo Niemi

J. Documentation, 2000

Query language approach based on the deductive object-oriented database paradigm.

Timo Niemi, M. Christensen, Kalervo Järvelin

Inf. Softw. Technol., 2000

The visual query language CQL for transitive and relational computation.

Kalervo Järvelin, Timo Niemi, Airi Salminen

Data Knowl. Eng., 2000

1999

Integration of complex objects and transitive relationships for information retrieval.

Kalervo Järvelin, Timo Niemi

Inf. Process. Manag., 1999

1996

The processing strategy for the NF² relational frc-interface.

Timo Niemi, Kalervo Järvelin

Inf. Softw. Technol., 1996

A Deductive Data Model for Query Expansion.

Kalervo Järvelin, Jaana Kristensen, Timo Niemi, Eero Sormunen, Heikki Keskustalo

Proceedings of the 19th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 1996

1995

A Straightforward NF² Relational Interface with Applications in Information Retrieval.

Timo Niemi, Kalervo Järvelin

Inf. Process. Manag., 1995

An NF² Relational Interface For Document Retrieval, Restructuring and Aggregation.

Kalervo Järvelin, Timo Niemi

Proceedings of the SIGIR'95, 1995

1993

Deductive Information Retrieval Based on Classifications.

Kalervo Järvelin, Timo Niemi

J. Am. Soc. Inf. Sci., 1993

An Entity-Based Approach to Query Processing in Relational Databases. Part II: Entity Query Construction and Updating.

Kalervo Järvelin, Timo Niemi

Data Knowl. Eng., 1993

An Entity-Based Approach to Query Processing in Relational Databases. Part I: Entity Type Representation.

Kalervo Järvelin, Timo Niemi

Data Knowl. Eng., 1993

1992

Operation-oriented query language approach for recursive queries - Part 2. Prototype implementation and its integration with relational databases.

Timo Niemi, Kalervo Järvelin

Inf. Syst., 1992

Operation-oriented query language approach for recursive queries - Part 1. Functional definition.

Timo Niemi, Kalervo Järvelin

Inf. Syst., 1992

Advanced Query Formulation in Deductive Databases.

Timo Niemi, Kalervo Järvelin

Inf. Process. Manag., 1992

1991

Prolog-Based Meta-Rules For Relational Database Representation and Manipulation.

Timo Niemi, Kalervo Järvelin

IEEE Trans. Software Eng., 1991

Advanced Retrieval From Heterogeneous Fact Databases: Integration of Data Retrieval, Conversion, Aggregation and Deductive Techniques.

Kalervo Järvelin, Timo Niemi

Proceedings of the 14th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval. Chicago, 1991

1988

An approach and its specification to data reformatting in data conversion.

Timo Niemi

Inf. Syst., 1988

1987

Advanced tools for data conversion and database cost modelling.

Kalervo Järvelin, Timo Niemi

Inf. Manag., 1987

1984

A Straightforward Formalization of the Relational Model.

Timo Niemi, Kalervo Järvelin

SIGMOD Rec., 1984

Specification of data restructuring software based on the attribute method.

Timo Niemi

Int. J. Parallel Program., 1984

Specification of a Query Language by the Attribute Method.

Timo Niemi

BIT, 1984

1983

A seven-tuple representation for hierarchical data structures.

Timo Niemi

Inf. Syst., 1983

Formal restructuring functions for hierarchical data bases.

Timo Niemi

Int. J. Parallel Program., 1983