The journal accepts different paper formats, to be concrete:

- Research paper: This is the most common paper format. It needs to provide a novel research contribution not published in any other journal. It can also provide an extension of a conference paper, but the contribution of the submission must be at least 50% novel. The recommended number of pages is 16, although the maximum is 40.

- Short paper: This kind of paper follows the same rules as a research paper, but the recommended number of pagers is 8 and the maximum is 15.

- Survey paper: A literature review of different papers into a specific topic. The authors will need to specify the collection methodology and provide a comprehensive contribution. The recommended number of pages is 30, although the maximum is 50.

- Tool paper: This type of paper focuses on a specific tool. The tool needs to be created by the author/s. If the tool is a software solution to an already published research paper, we recommend the authors provide the reference. The tool must be open source or free software. A tool paper needs to describe: the problem the tool aims to solve, how it solves, limitations, some implementation details for developers about the tool structure, and a user manual with some examples. The recommended number of pages is 15, although the maximum is 40.

- Negative Results paper: This kind of paper follows the same rules of a "Research paper" but it focuses on novel work with negative results. We encourage authors to also publish those results that are not successful to guide future researchers.

- Project Report: These reports aim to present or promote a research project. The recommended length is 3 pages and the limit is 10 pages. We encourage the authors to provide an introduction motivating the project aim, context on the project methodologies, a section with the solutions the project has found, the list of contributions of the project, and future research lines.