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Call for Workshop Proposals: ACM RecSys2021

Tuesday, March 2, 2021

Event Details

For the online version of this Call, visit:  

We are pleased to invite you to contribute to the 15th ACM Conference on Recommender Systems (RecSys 2021), the premier venue for research on the foundations and applications of recommendation technologies. The upcoming RecSys conference will be held from September 27 to 1 October, 2021. The conference will be held in Amsterdam, Netherlands, with an inclusive format that accommodates remote attendance. The conference will continue RecSys’ practice of connecting the research and practitioner communities to exchange ideas, frame problems, and share solutions. RecSys 2021 is pleased to invite proposals for workshops to be held in conjunction with the conference. The goal of the workshops is to provide additional venues for discussing novel ideas as well as recent results of research in progress.

In 2021 our goal is to have a balanced workshop program which comprises workshop formats of different types and a combination of newly emerging, currently evolving, and historically understudied topics. Different full-day and half-day workshop formats are possible, for example:

Workshops with novel interactive formats and a relatively small number of participants. Such workshop formats might for example target at the exploration of a certain topic during the workshop through a moderated discussion or breakout sessions, resulting in a draft paper or report to be completed and published after the workshop. Or they might focus on datasets and benchmarking for a particular problem or domain. Particular priority will be given to these formats which require the active involvement of the participants.
Workshops with the traditional workshop format on specialized topics. Such workshops typically have their own paper submission and review processes. Proposals for continuations of existing workshop series are welcome, however, please include a brief statement on the necessity for the new edition, including a description of the outcomes of previous years and the expected novelty of this edition.
We encourage you to contact us by email at up to three weeks before the deadline with workshop ideas; we will work with prospective workshop organizers to help them design successful proposals. In particular, for workshop proposals with novel interactive formats we are happy to assist you in further developing and implementing your ideas. We actively encourage both researchers and industry practitioners to submit workshop proposals.


All submissions and reviews will be handled electronically. The maximum length is 7 pages (excluding references) in the new single-column format. Workshop proposals must be submitted to PCS by 23:59, AoE (Anywhere on Earth) on March 2nd, 2021.

Contents of the proposal
The workshop proposal should be organized as follows:

Workshop title.
A short description of the workshop including the rationale for the workshop and how and why it fits the audience of RecSys. This description should include also the topic and its relevance to the community as well as format, and details about what type of submission is requested from prospective attendees. Please also add an explanation on how the workshop complements, rather than duplicates, the topics of the main conference.
Name, email address, and affiliation for workshop organizers and a brief description of their experience in organizing such events. Note that organizers are expected to attend the workshop and be actively involved in its organization.
Requested duration (half day or full day), and expected number of participants.
Description of workshop activities. Outline how the workshop will be organized and how the time will be spent. In particular, please sketch how you will engage participants to foster more interactivity and engagement during the workshop.
For workshops involving paper submissions, an initial − and for the most part confirmed − Program Committee (or a clear justification why it is not needed).
For more interactive workshop formats, also outline the process of selecting or inviting the participants.
Description of plans for promoting the workshop and disseminating the results, for instance, by organizing a journal special issue with extended versions of the workshop’s best papers.
History of prior workshops on this topic (e.g., including the number of submissions and attendees), if any.

Ability of the topic to contribute to the continued development of the field of recommender systems.
Level of complementarity of the topic to the main conference.
Clear plan for attracting submissions, making the workshop itself productive, and disseminating results.
Evidence that this plan will be successful.
Experience of the organizers.
Workshop summary
The organizers of accepted workshops will be invited to write a camera-ready summary of the workshop. Workshop summaries will be later submitted to ACM’s new production platform where authors will be able to review PDF and HTML output formats before publication.

ACM’s archival publication format separates content from presentation in the Digital Library to enhance accessibility and improve the flexibility and resiliency of our publications. Following the ACM publication workflow, all authors should submit manuscripts for review in a single-column format. Instructions for Word and LaTeX authors are given below:

Microsoft Word: Write your paper using the Submission Template (Review Submission Format). Follow the embedded instructions to apply the paragraph styles to your various text elements. The text is in single-column format at this stage and no additional formatting is required at this point.
LaTeX: Please use the latest version of the Master Article Template – LaTeX to create your submission. You must use the “manuscript” option with the \documentclass[manuscript]{acmart} command to generate the output in a single-column format which is required for review. Please see the LaTeX documentation and ACM’s LaTeX best practices guide for further instructions. To ensure 100% compatibility with The ACM Publishing System (TAPS), please restrict the use of packages to the whitelist of approved LaTeX packages.
A document with some frequently asked questions can be found here.

Authors are strongly encouraged to provide “alt text” (alternative text) for floats (images, tables, etc.) in their content so that readers with disabilities can be given descriptive information for these floats that are important to the work. The descriptive text will be displayed in place of a float if the float cannot be loaded. This benefits the author as well as it broadens the reader base for the author’s work. Moreover, the alt text provides in-depth float descriptions to search engine crawlers, which helps to properly index these floats. Additionally, authors should follow the ACM Accessibility Recommendations for Publishing in Color and SIG ACCESS guidelines on describing figures.

Should you have any questions or issues going through the instructions above, please contact support at for both LaTeX and Microsoft Word inquiries. The overview papers of accepted workshops will be later submitted to ACM’s new production platform where authors will be able to review PDF and HTML output formats before publication.


Workshop proposal submission deadline: March 2nd, 2021
Workshop proposal notification: March 16th, 2021
Camera-ready workshop summary deadline: July 20th, 2021
We furthermore encourage the organizers to stick to the following suggested deadlines in the schedule for authors:

Call for Papers publication: April 2nd, 2021
Paper submission deadline: July 29th, 2021
Reviewer deadline: August 14th, 2021
Author notification: August 21st, 2021
Camera-ready version deadline: September 4th, 2021
These dates consider in particular the synchronization with the notification of acceptance in the main conference track, and the availability of early registration for the authors of accepted workshop papers.

Deadlines refer to 23:59 (11:59pm) in the AoE (Anywhere on Earth) time zone.

Jen Golbeck, University of Maryland, USA
Marijn Koolen, Royal Netherlands Academy of Arts and Sciences
Denis Parra, Pontificia Universidad Católica de Chile