| Vol-3089 urn:nbn:de:0074-3089-9 Copyright © 2022 for the individual papers by the papers' authors. Copyright © 2022 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).

# TTC 2020/2021
Joint Proceedings of the 13th and 14th Tool Transformation Contests

### The TTC pandemic proceedings with CEUR-WS
co-located with Software Technologies: Applications and Foundations (STAF 2021)

### Virtual Event, Bergen, Norway, July 17, 2020 and June 25, 2021.

Edited by

### Artur Boronat *
Antonio García-Domínguez **
Georg Hinkel ***

* University of Leicester, School of Computing and Mathematical Sciences, University Rd, LE1 7RH, UK
** Aston University, Aston Triangle, Birmingham, B4 7ET, UK
*** Tecan Software Competence Center GmbH, Peter-Sander-Straße 41a, 55252 Wiesbaden, Germany

## Table of Contents

- Preface
  Summary: 13 papers were accepted for this volume, 3 cases and 10 solutions.

### Case Round-trip Migration (13th Transformation Tool Contest)

- Round-trip migration of object-oriented data model instances
  Luca Beurer-Kellner, Jens von Pilgrim, Timo Kehrer
- EMF-Syncer solution to TTC’20 round-trip migration case
  Artur Boronat
- The Fulib solution to the TTC 2020 migration case
  Sebastian Copei, Albert Zuendorf
- An NMF solution to the TTC 2020 roundtrip engineering case
  Georg Hinkel
- Supporting round-trip data migration for web APIs with Henshin
  Daniel Strüber

### Case Laboratory Workflows (14th Transformation Tool Contest)

- Incremental recompilation of laboratory workflows
  Georg Hinkel
- Incremental execution of relational transformation specifications in YAMTL: a case with laboratory workflows
  Artur Boronat
- The Fulib solution to the TTC 2021 laboratory workflow case
  Sebastian Copei, Adrian Kunz, Albert Zuendorf
- An NMF solution to the TTC2021 incremental recompilation of laboratory workflows case
  Georg Hinkel
- (Ab)using incremental ATL on the TTC 2021 incremental laboratory workflow benchmark
  Frédéric Jouault, Théo Le Calvar

### Case OCL2PSQL (14th Transformation Tool Contest)

- The TTC 2021 OCL2PSQL case
  Hoang Phuoc-Bao Nguyen, Antonio García-Domíguez, Manuel Clavel
- The Epsilon Solution to the OCL2PSQL Case
  Antonio García-Domíguez
- An NMF solution to the TTC 2021 OCL to SQL case
  Georg Hinkel

2022-02-04: submitted by Artur Boronat, metadata incl. bibliographic data published under Creative Commons CC0
2022-02-15: published on CEUR Workshop Proceedings (CEUR-WS.org, ISSN 1613-0073) |valid HTML5|