Estimating missing temporal meta-information using Knowledge-Based-Trust


Oulabi, Yaser ; Bizer, Christian


URL: http://ceur-ws.org/Vol-1959/paper-04.pdf
Additional URL: http://ceur-ws.org/Vol-1959/
Document Type: Conference or workshop publication
Year of publication: 2017
Book title: KDWEB 2017 : proceedings of the 3rd International Workshop on Knowledge Discovery on the WEB Cagliari, Italy, September 11 to 12, 2017
The title of a journal, publication series: CEUR Workshop Proceedings
Volume: 1959
Page range: Paper 4
Conference title: 3rd International Workshop on Knowledge Discovery on the WEB
Location of the conference venue: Cagliari, Italy
Date of the conference: September 11-12, 2017
Author/Publisher of the book
(only the first ones mentioned)
:
Armano, Giuliano
Place of publication: Aachen
Publishing house: RWTH
ISSN: 1613-0073
Publication language: English
Institution: School of Business Informatics and Mathematics > Wirtschaftsinformatik V (Bizer)
Subject: 004 Computer science, internet
Keywords (English): temporal meta-information , time-dependent data , knowledge-based-trust , knowledge bases
Abstract: A large number of HTML Tables on the Web contain relational data which can be used to augment knowledge bases such as DBpedia, Yago, or Wikidata. A large part of this data is time-dependent, i.e., the correctness of a fact depends on a specific temporal scope. In order to use this data for knowledge base augmentation, we need temporal meta-information. Existing methods rely on timestamps within the table itself or its context as temporal meta-information. Yet, the relationship between these timestamps and data within a table is often unclear. Additionally, timestamps are rather sparse, and there are many web tables for which no timestamps exist. Knowledge-Based-Trust (KBT) uses the overlap with ground-truth to estimate the trustworthiness of a dataset. This paper introduces TimedKBT, which overcomes the dependence on sparse and possibly misinterpreted timestamps by propagating temporal meta-information from a knowledge base to web table data using KBT. It also derives a trust score that estimates the correctness of the data and the assigned temporal meta-information. We evaluate Timed-KBT on the use case of fusing data from a large corpus of web tables for filling missing facts in a knowledge base. Our evaluation shows that Timed-KBT yields an increase in F0.25-Measure of 19.01 % when compared to KBT and 9.44 % when compared to a method that relies solely on timestamps extracted from the table and its context.

Dieser Eintrag ist Teil der Universitätsbibliographie.




+ Citation Example and Export

Oulabi, Yaser ; Bizer, Christian ORCID: 0000-0003-2367-0237 Estimating missing temporal meta-information using Knowledge-Based-Trust. Armano, Giuliano CEUR Workshop Proceedings 1959 Paper 4 In: KDWEB 2017 : proceedings of the 3rd International Workshop on Knowledge Discovery on the WEB Cagliari, Italy, September 11 to 12, 2017 (2017) Aachen 3rd International Workshop on Knowledge Discovery on the WEB (Cagliari, Italy) [Conference or workshop publication]


+ Search Authors in

BASE: Oulabi, Yaser ; Bizer, Christian

Google Scholar: Oulabi, Yaser ; Bizer, Christian

ORCID: Oulabi, Yaser ; Bizer, Christian ORCID: 0000-0003-2367-0237

+ Page Views

Hits per month over past year

Detailed information



You have found an error? Please let us know about your desired correction here: E-Mail


Actions (login required)

Show item Show item