The growing number of datasets published on the Web as linked data brings both opportunities for high data availability and challenges inherent to querying data in a semantically heterogeneous and distributed environment. Approaches used for querying siloed databases fail at Web-scale because users don't have an a priori understanding of all the available datasets. This article investigates the main challenges in constructing a query and search solution for linked data and analyzes existing approaches and trends.
Full article: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6051410&tag=1
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Querying Heterogeneous Datasets on the Linked Data Web: Challenges, Approaches, and Trends
1. Digital Enterprise Research Institute www.deri.ie
Querying Heterogeneous Datasets on
the Linked Data Web:
Challenges, Approaches, and Trends
André Freitas, Edward Curry, João G. Oliveira,
Seán O’Riain
Copyright 2009 Digital Enterprise Research Institute. All rights reserved.
7. Challenges
Digital Enterprise Research Institute www.deri.ie
This analysis focuses on the investigation of
existing approaches under the perspective
of the usability-expressivity trade-off.
This focus guides the categorization and
analysis of existing challenges, approaches
and trends.
8. Challenge Dimensions
Digital Enterprise Research Institute www.deri.ie
Query expressivity
Usability
Vocabulary-level semantic matching
Entity Reconciliation
Semantic Tractability mechanisms
10. Approaches
Digital Enterprise Research Institute www.deri.ie
Information Retrieval approaches
Entity-centric search
Structure search
Natural Language approaches
Question Answering
Semantic best-effort natural language interfaces
17. Addressing the Challenges
Digital Enterprise Research Institute www.deri.ie
The functionality analysis of existing
approaches provides insights on how the
major challenges should be addressed.
This set of strategic functionalities define
the set of trends.
19. Trends
Digital Enterprise Research Institute www.deri.ie
Complementary Search and Query Services
User Interaction and Feedback Mechanisms
Semantic Best-Effort Query Model
Natural Language Processing Techniques
Distributional Semantic Model
External Knowledge Sources for Semantic
Enrichment
Integrated Entity Reconciliation Techniques