Pytheas: Pattern-based Table Discovery in CSV Files

Summary: Pytheas uses pattern-based line classification and column-value coherency to discover tables in loosely structured CSVs. It achieves precision/recall above 95% (vs ~89/81), generalizes across countries, and provides a confidence measure for potential errors. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID: 12101
Venue: VLDB
Year: 2020
Pagerank: 6.5777452e-05
Overall Rank: 3,968 | 72.43%
DOI: 10.14778/3407790.3407810

Incoming Non-self Citations Over Time

Authors

Incoming Citations (Sorted by Pagerank)

Showing 4 of 4 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
7,100	Mondrian: Spreadsheet Layout Detection	2022	SIGMOD	4.826163e-05
7,810	Pollock: A Data Loading Benchmark	2023	VLDB	4.6415099e-05
8,500	A Demonstration of KGLac: A Data Discovery and Enrichment Platform for Data Science	2021	VLDB	4.4920292e-05
11,423	Detecting Layout Templates in Complex Multiregion Files	2022	VLDB	4.1905499e-05

Outgoing Citations (Sorted by Pagerank)

Showing 13 of 13 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
108	WebTables: Exploring the Power of Tables on the Web	2008	VLDB	0.00048345996
420	InfoGather: Entity Augmentation and Attribute Discovery By Holistic Matching with Web Tables	2012	SIGMOD	0.00023700634
519	Data Integration for the Relational Web	2009	VLDB	0.00021148006
1,179	Table Union Search on Open Data	2018	VLDB	0.00013458551
1,316	Harvesting Relational Tables from Lists on the Web	2009	VLDB	0.00012616422
1,370	Answering Table Queries on the Web using Column Keywords	2012	VLDB	0.00012339543
2,142	LSH Ensemble: Internet-Scale Domain Search	2016	VLDB	9.4461701e-05
2,638	Schema Extraction for Tabular Data on the Web	2013	VLDB	8.3995765e-05
2,737	Open Data Integration	2018	VLDB	8.2053894e-05
3,232	InfoGather+: Semantic Matching and Annotation of Numeric and Time-Varying Attributes in Web Tables	2013	SIGMOD	7.3324293e-05
3,432	Speculative Distributed CSV Data Parsing for Big Data Analytics	2019	SIGMOD	7.0974248e-05
3,745	TEGRA: Table Extraction by Global Record Alignment	2015	SIGMOD	6.7907837e-05
6,845	A framework for annotating CSV-like data	2016	VLDB	4.9045502e-05

Semantically Similar Papers

Overall Rank	Paper	Year	Venue	Pagerank
1,005	Recovering Semantics of Tables on the Web	2011	VLDB	0.00014694038
5,538	Data-Driven Domain Discovery for Structured Datasets	2020	VLDB	5.4520759e-05
814	Finding Related Tables	2012	SIGMOD	0.00016298739
7,423	Table Extraction and Understanding for Scientific and Enterprise Applications	2020	VLDB	4.729385e-05
8,915	Making Table Understanding Work in Practice	2022	CIDR	4.4229886e-05
1,316	Harvesting Relational Tables from Lists on the Web	2009	VLDB	0.00012616422
10,109	Retrieve-and-Verify: A Table Context Selection Framework for Accurate Column Annotations	2026	SIGMOD	4.1905499e-05
2,638	Schema Extraction for Tabular Data on the Web	2013	VLDB	8.3995765e-05
11,350	Pythia: Unsupervised Generation of Ambiguous Textual Claims from Relational Data	2022	SIGMOD	4.1905499e-05
6,845	A framework for annotating CSV-like data	2016	VLDB	4.9045502e-05