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Hansjorg Sand

dblp:309/5922 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2022
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Databases, data management, data science and information retrieval · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Databases, data mining, and information retrieval
1 paper
Data integration and cleaning · 50% Knowledge graphs · 50%

Topics — the 2 heaviest of 2, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Data integration and cleaning
entity resolution
0.612022
Unsupervised Matching of Data and Text · ICDE 2022
Knowledge graphs › knowledge graph alignment › entity alignment
unsupervised entity alignment
0.612022
Unsupervised Matching of Data and Text · ICDE 2022

Methods — techniques the papers use, named apart from their topics

word embeddings · 0.6graph construction · 0.6expand and compress · 0.6
YearPublicationVenuePosition
2022 Unsupervised Matching of Data and Text
abstract
Entity resolution is a widely studied problem with several proposals to match records across relations. Matching textual content is a widespread task in many applications, such as question answering and search. While recent methods achieve promising results for these two tasks, there is no clear solution for the more general problem of matching textual content and structured data. We introduce a framework that supports this new task in an unsupervised setting for any pair of corpora, being relational tables or text documents. Our method builds a fine-grained graph over the content of the corpora and derives word embeddings to represent the objects to match in a low dimensional space. The learned representation enables effective and efficient matching at different granularity, from relational tuples to text sentences and paragraphs. Our flexible framework can exploit pre-trained resources, but, differently from other solutions, it does not depends on their existence and achieves better quality performance in matching content when the vocab-ulary is domain specific. We also introduce optimizations in the graph creation process with an “expand and compress” approach that first identifies new valid relationships across elements, to improve matching, and then prunes nodes and edges, to reduce the graph size. Experiments on real use cases and public datasets show that our framework produces embeddings that outperform word embeddings and fine-tuned language models both in results' quality and in execution times.
Naser Ahmadi, Hansjorg Sand, Paolo Papotti
ICDE2