What file extensions are specific to qualified and advanced seals?
A definition of qualified and advanced seals can be found on this page https://europa.eu/europass/en/how-issue-european-digital-credentials at the section "Advanced or Qualified eSeal"
A more detailed specification of these two types of seals can be found at https://web.archive.org/web/20180115001229/http:/eur-lex.europa.eu/legal-content/EN/TXT/?uri=uriserv:OJ.L_.2014.257.01.0073.01.ENG at the section "Languages, formats and link to OJ", by clicking at the item on the row PDF and column EN (English).
Having defined what a qualified / advanced seal means (at least, in the view of the europass platform), my question is: what file formats can such a seal have, once installed on the computer (in the Windows keystore) ?
Given a type of a seal (qualified or advanced), is it constrained to have a particular extension, or it can take any of the acceptable extensions for an electronic certificate ?
I am totally new to the electronic certificates. Right now I am about to purchase one, and I need to make sure that it is compatible with a particular remote signature tool (Nowina's NexU - https://github.com/nowina-solutions/nexu/releases/download/nexu-1.22/nexu-bundle-1.22.zip ; clicking this link will start downloading a zip file)
