I was using an old LMTX copy, and that was the issue. Thanks to Hans for pointing that out. Now I'm trying to expand my solution a little more. Is there any way to retrieve an element in a dataset by using the key? For example, given an "authors" dataset, I would like to do something similar to: %% Given this data structure ... \setdataset[authors][ nombre={Andrés Conrado Montoya Acosta}, bio={This is a bio, it could be two or three paragraphs long}, email={loremipsum@email.edu.co}, cvlac={ https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?... }, orcid={https://orcid.org/0009-0007-0765-4241}, gscholar={ https://scholar.google.com/citations?user=GpYTTU0AAAAJ&hl=es&authuser=1}, ] %% I want to do something like.... \startGetAuthor[nombre={Andrés Conrado Montoya Acosta}] \datasetentry{bio}\par email: \mailhref{\datasetentry{email}} \stopGetAuthor So, if my name is found in the dataset, get the data for that name. Is something like that possible? Thank you for your time. -- Andrés Conrado Montoya Andi Kú andresconrado@gmail.com http://sesentaycuatro.com http://messier87.com http://chiquitico.org ---------------------------------------- Los fines no justifican los medios, porque la medida verdadera de nuestro carácter está dada por los medios que estamos dispuestos a utilizar, no por los fines que proclamamos. ---------------------------------------- “You develop an instant global consciousness, a people orientation, an intense dissatisfaction with the state of the world, and a compulsion to do something about it. From out there on the moon, international politics look so petty. You want to grab a politician by the scruff of the neck and drag him a quarter of a million miles out and say, ‘Look at that, you son of a bitch.’” — Apollo 14 astronaut Edgar Mitchell