Timo Niemi

Publication Activity (10 Years)

Years Active: 1983-2015
Publications (10 Years): 1

Top Topics

Relational Algebra

Enterprise Information Systems

Top Venues

J. Assoc. Inf. Sci. Technol.

Enterp. Inf. Syst.

Publications

Katja Moilanen, Timo Niemi, Turkka Näppilä, Mikko Kuru
A visual XML dataspace approach for satisfying ad hoc information needs. J. Assoc. Inf. Sci. Technol. 66 (11) (2015)
Timo Niemi, Marko Junkkari, Kalervo Järvelin
Concept-based query language approach to enterprise information systems. Enterp. Inf. Syst. 8 (1) (2014)
Turkka Näppilä, Timo Niemi
An approach for developing a schemaless XML dataspace profiling system. J. Inf. Sci. 38 (3) (2012)
Turkka Näppilä, Katja Moilanen, Timo Niemi
A query language for selecting, harmonizing, and aggregating heterogeneous XML data. Int. J. Web Inf. Syst. 7 (1) (2011)
Janne Jämsen, Timo Niemi, Kalervo Järvelin
Derived types in semantic association discovery. J. Intell. Inf. Syst. 35 (2) (2010)
Timo Niemi, Turkka Näppilä, Kalervo Järvelin
A relational data harmonization approach to XML. J. Inf. Sci. 35 (5) (2009)
Turkka Näppilä, Kalervo Järvelin, Timo Niemi
A tool for data cube construction from structurally heterogeneous XML documents. J. Assoc. Inf. Sci. Technol. 59 (3) (2008)
Timo Niemi, Janne Jämsen
A query language for discovering semantic associations, Part I: Approach and formal definition of query primitives. J. Assoc. Inf. Sci. Technol. 58 (11) (2007)
Timo Niemi, Janne Jämsen
A query language for discovering semantic associations, Part II: sample queries and query evaluation. J. Assoc. Inf. Sci. Technol. 58 (11) (2007)
Timo Niemi, Marko Junkkari, Kalervo Järvelin, Samu Viita
Advanced query language for manipulating complex entities. Inf. Process. Manag. 40 (6) (2004)
Timo Niemi, Lasse Hirvonen, Kalervo Järvelin
Multidimensional Data Model and Query Language for Informetrics. J. Assoc. Inf. Sci. Technol. 54 (10) (2003)
Timo Niemi, Marko Junkkari, Kalervo Järvelin
Relational Deductive Object-Oriented Modeling (RDOOM) Approach for Finding, Representing and Integrating Application-Specific Concepts. Int. J. Softw. Eng. Knowl. Eng. 12 (4) (2002)
Kalervo Järvelin, Jaana Kekäläinen, Timo Niemi
ExpansionTool: Concept-Based Query Expansion and Construction. Inf. Retr. 4 (3-4) (2001)
Timo Niemi, M. Christensen, Kalervo Järvelin
Query language approach based on the deductive object-oriented database paradigm. Inf. Softw. Technol. 42 (11) (2000)
Kalervo Järvelin, Timo Niemi, Airi Salminen
The visual query language CQL for transitive and relational computation. Data Knowl. Eng. 35 (1) (2000)
Kalervo Järvelin, Peter Ingwersen, Timo Niemi
A user-oriented interface for generalised informetric analysis based on applying advanced data modelling techniques. J. Documentation 56 (3) (2000)
Kalervo Järvelin, Timo Niemi
Integration of complex objects and transitive relationships for information retrieval. Inf. Process. Manag. 35 (5) (1999)
Kalervo Järvelin, Jaana Kristensen, Timo Niemi, Eero Sormunen, Heikki Keskustalo
A Deductive Data Model for Query Expansion. SIGIR (1996)
Timo Niemi, Kalervo Järvelin
relational frc-interface. Inf. Softw. Technol. 38 (1) (1996)
Kalervo Järvelin, Timo Niemi
Relational Interface For Document Retrieval, Restructuring and Aggregation. SIGIR (1995)
Timo Niemi, Kalervo Järvelin
A Straightforward NF² Relational Interface with Applications in Information Retrieval. Inf. Process. Manag. 31 (2) (1995)
Kalervo Järvelin, Timo Niemi
An Entity-Based Approach to Query Processing in Relational Databases. Part I: Entity Type Representation. Data Knowl. Eng. 10 (1993)
Kalervo Järvelin, Timo Niemi
Deductive Information Retrieval Based on Classifications. J. Am. Soc. Inf. Sci. 44 (10) (1993)
Kalervo Järvelin, Timo Niemi
An Entity-Based Approach to Query Processing in Relational Databases. Part II: Entity Query Construction and Updating. Data Knowl. Eng. 10 (1993)
Timo Niemi, Kalervo Järvelin
Operation-oriented query language approach for recursive queries - Part 2. Prototype implementation and its integration with relational databases. Inf. Syst. 17 (1) (1992)
Timo Niemi, Kalervo Järvelin
Advanced Query Formulation in Deductive Databases. Inf. Process. Manag. 28 (2) (1992)
Timo Niemi, Kalervo Järvelin
Operation-oriented query language approach for recursive queries - Part 1. Functional definition. Inf. Syst. 17 (1) (1992)
Kalervo Järvelin, Timo Niemi
Advanced Retrieval From Heterogeneous Fact Databases: Integration of Data Retrieval, Conversion, Aggregation and Deductive Techniques. SIGIR (1991)
Timo Niemi, Kalervo Järvelin
Prolog-Based Meta-Rules For Relational Database Representation and Manipulation. IEEE Trans. Software Eng. 17 (8) (1991)
Timo Niemi
An approach and its specification to data reformatting in data conversion. Inf. Syst. 13 (1) (1988)
Kalervo Järvelin, Timo Niemi
Advanced tools for data conversion and database cost modelling. Inf. Manag. 13 (1) (1987)
Timo Niemi, Kalervo Järvelin
Straightforward formalization of the relational model. Inf. Syst. 10 (1) (1985)
Timo Niemi
Specification of data restructuring software based on the attribute method. Int. J. Parallel Program. 13 (6) (1984)
Timo Niemi
Specification of a Query Language by the Attribute Method. BIT 24 (2) (1984)
Timo Niemi, Kalervo Järvelin
A Straightforward Formalization of the Relational Model. SIGMOD Rec. 14 (1) (1984)
Timo Niemi
Formal restructuring functions for hierarchical data bases. Int. J. Parallel Program. 12 (6) (1983)
Timo Niemi
A seven-tuple representation for hierarchical data structures. Inf. Syst. 8 (3) (1983)