Creo Schematic - Understanding modern Central Catalog 9.0 vs (Central Catalog from Ver 7.0)

I'm trying to update a central catalog that was built ~10 years ago (2012).

A few questions

1) could someone send an example of what the organization in a central catalog directory looks like?

I'm aware that datasets are saved in csv files

2) From what I read .pkg and .lst files are no longer used since ver 7.0, is this true?

3) What is the difference between a .pkg and .lst file?

4) Are all artifacts saved as .she files now? Is it possible to turn translate info from a .pkg/lst file into a .she file?