GitLab

repalce some `ref` (related to frame) to `flat` in order to be more generic

Closes #2

See merge request !60

[refactoring] try to get rid of the 'ref' (frame) references and replace them by flat in order to be not on the esrf reference.

/close #2

add get_relative_file

Closes #37

See merge request !59

User-defined NX version

See merge request !58

Improve mock

See merge request !57

[doc] move to autosumary

See merge request !56

Add validator

Closes #35

See merge request !55

- now we work on caompacted urls to avoid several file opening / closing
- we look at the dataset specific virtual source and not all sources.
  This is handled only at level 1. Not at virtual source src_space

Handle the url.data_slice