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The Lixto Data Extraction Project - Back and Forth between Theory and Practice

Summary: Lixto ties database theory to scraping practice via a logic-based wrapper language (Elog/monadic datalog over trees) with formal expressiveness and complexity characterizations. Combined with a visual spec UI and a streaming Transformation Server for scalable Web-data integration. (summarized by gpt-5-mini on Feb 09 2026)

Paper ID
hebb6a4a838e5dff1
Venue
PODS
Year
2004
Pagerank
0.00011759744
Overall Rank
1,155 | 92.26%
DOI
10.1145/1055558.1055560

Incoming Non-self Citations Over Time

Authors

BibTeX Citation

@inproceedings{gottlob_pods04,
        address = {New York, NY, USA},
        series = {{PODS} '04},
        title = {{The Lixto Data Extraction Project - Back and Forth between Theory and Practice}},
        url = {https://dl.acm.org/doi/10.1145/1055558.1055560},
        doi = {10.1145/1055558.1055560},
        booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
        publisher = {Association for Computing Machinery},
        author = {Gottlob, Georg and Koch, Christoph and Baumgartner, Robert and Herzog, Marcus and Flesca, Sergio},
        year = {2004}
}

Incoming Citations (Sorted by Pagerank)

Showing 17 of 17 citing papers.

Rank Citing Paper Year Venue Pagerank
330 Declarative Information Extraction Using Datalog with Embedded Extraction Predicates 2007 VLDB 0.00020870379
569 Incremental Knowledge Base Construction Using DeepDive 2015 VLDB 0.00016212139
2,653 The SphereSearch Engine for Unified Ranked Retrieval of Heterogeneous XML and Web Documents 2005 VLDB 8.1494409e-05
3,285 Toward Best-Effort Information Extraction 2008 SIGMOD 7.4430978e-05
3,924 Efficiently Incorporating User Feedback into Information Extraction and Integration Programs 2009 SIGMOD 6.9044317e-05
4,403 Extracting Databases from Dark Data with DeepDive 2016 SIGMOD 6.6033854e-05
5,089 Datalog Unchained 2021 PODS 6.2661323e-05
5,608 Datalog and Emerging Applications: An Interactive Tutorial 2011 SIGMOD 6.0506609e-05
5,726 Documentum ECI Self-Repairing Wrappers: Performance Analysis 2006 SIGMOD 5.9991283e-05
6,091 From Information to Knowledge: Harvesting Entities and Relationships from Web Sources 2010 PODS 5.8724947e-05
6,495 The INFOMIX System for Advanced Integration of Incomplete and Inconsistent Data 2005 SIGMOD 5.7492552e-05
7,994 The Smallest Extraction Problem 2021 VLDB 5.394581e-05
8,206 SXPath - Extending XPath towards Spatial Querying on Web Documents 2011 VLDB 5.3616552e-05
9,870 Relational Data Mapping in MIQIS 2005 SIGMOD 5.1054297e-05
12,440 Defining Relations on Graphs: How Hard is it in the Presence of Node Partitions? 2015 PODS 4.9605343e-05
12,582 Knowledge Harvesting in the Big-Data Era 2013 SIGMOD 4.9605343e-05
12,793 ObjectRunner: Lightweight, Targeted Extraction and Querying of Structured Web Data 2010 VLDB 4.9605343e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 6 of 6 cited papers.

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

Rank Cited Paper Year Venue Pagerank
683 Efficient Algorithms for Processing XPath Queries 2002 VLDB 0.00014781223
1,606 Conjunctive Queries over Trees 2004 PODS 0.00010079487
2,238 Monadic Datalog and the Expressive Power of Languages for Web Information Extraction 2002 PODS 8.7761804e-05
2,624 Visual Web Information Extraction with Lixto 2001 VLDB 8.1951041e-05
2,691 Efficient Processing of Expressive Node-Selecting Queries on XML Data in Secondary Storage: A Tree Automata-based Approach 2003 VLDB 8.1124785e-05
2,955 Numerical Document Queries 2003 PODS 7.8040868e-05
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# Overall Rank Paper Year Venue
1 330 Declarative Information Extraction Using Datalog with Embedded Extraction Predicates 2007 VLDB
2 8,753 An XML-based Wrapper Generator for Web Information Extraction 1999 SIGMOD
3 3,039 Expressive and efficient pattern languages for tree-structured data (extended abstract) 2000 PODS
4 9,210 Towards Theory for Real-World Data 2022 PODS
5 2,876 Expressive and Flexible Access to Web-Extracted Data: A Keyword-based Structured Query Language 2010 SIGMOD
6 2,414 Document Spanners for Extracting Incomplete Information: Expressiveness and Complexity 2018 PODS
7 3,400 On Wrapping Query Languages and Efficient XML Integration 2000 SIGMOD
8 10,083 Supervised Wrapper Generation with Lixto 2001 VLDB
9 2,624 Visual Web Information Extraction with Lixto 2001 VLDB
10 2,238 Monadic Datalog and the Expressive Power of Languages for Web Information Extraction 2002 PODS