in my Drupal 8 site, I want to export certain nodes and taxonomy terms into files (JSON or XML) using the Migrate module. (The goal is to have this data in Version control, and to be able to import/update it later.)
However, I have trouble in finding any examples for exporting from Drupal to files (there are many for the other direction).
Can one of suggest me which (preferably core) plugins from Migrate I can use as source (something that reads entities, with being able to define the IDs to be exported) and also as destination (something that writes into JSON/XML or even YAML).