| Vol-4137 urn:nbn:de:0074-4137-x Copyright © 2025 for the individual papers by the papers' authors. Copyright © 2025 for the volume as a collection by its editors. This volume and its papers are published under the Creative Commons License Attribution 4.0 International (CC BY 4.0).

# WOWS 2025
Workshop on Open Web Search 2025

### Proceedings of the 2nd International Workshop on Open Web Search
co-located with the 47th European Conference on Information Retrieval (ECIR 2025)

### Lucca, Italy, April 10, 2025.

Edited by

### Sheikh Mastura Farzana1
Maik Fröbe2
Gijs Hendriksen3
Djoerd Hiemstra3
Martin Potthast4,5,6
Arjen P. de Vries3
Saber Zerhoudi7

1 German Aerospace Center, Linder Höhe, 51147 Köln, Germany
2 Friedrich-Schiller-Universität Jena, Fürstengraben 1, 07743 Jena, Germany
3 Radboud University, Houtlaan 4, 6525 XZ Nijmegen, The Netherlands
4 University of Kassel, Mönchebergstraße 19, 34125 Kassel, Germany
5 hessian.AI, Karolinenplatz 5, 64289 Darmstadt, Germany
6 ScaDS.AI, Humboldtstraße 25, 04105 Leipzig, Germany
7 University of Passau, Innstr. 41, 94032 Passau, Germany

## Table of Contents

- Preface
  Summary: There were 6 papers submitted to this workshop. Out of these, 6 papers were accepted for this volume, 5 as regular papers and 1 as short paper.

### Keynote

- Annotative Indexing - Abstract 1
  Charles Clarke

### Papers

- Investigating the Robustness of Embedding Models on Noisy Input Texts 2-12
  Michael Dinzinger, Laura Caspari, Kanishka Ghosh Dastidar, Jelena Mitrović, Michael Granitzer
- Document Quality Scoring for Web Crawling 13-22
  Francesca Pezzuti, Ariane Mueller, Sean MacAvaney, Nicola Tonellotto
- On Precomputation and Caching in Information Retrieval Experiments with Pipeline Architectures 23-35
  Sean MacAvaney, Craig Macdonald
- Combining Embedding Models for RAG: A Similarity-Based Approach 36-49
  Kanishka Ghosh Dastidar, Michael Dinzinger, Laura Caspari, Jelena Mitrović, Michael Granitzer
- Supporting Vertical Web Search and Customized Search Applications with the Modular and Open Framework MOSAIC 50-61
  Sebastian Gürtl, Alexander Nussbaumer, Christian Gütl
- WOWS-EVAL 2025: Efficient Baselines for Automated Relevance Label Transfer 62-71
  Daria Alexander, Gijs Hendriksen, Maik Fröbe

2025-11-24: submitted by Gijs Hendriksen, metadata incl. bibliographic data published under Creative Commons CC0
2025-12-18: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|