Export from DT - protect metadata

I am not sure, but what I see, if I export from DT files to the file system, are all metadata saved with the files (inside the files).
Keywords, Descriptions and even Tags should be somehow saved inside the files and searchable via the filesystem (spotlight).
Is this function provided?

Jui

Except as noted in sjk’s reponse, below, files exported from DT retain all metadata, including metadata searchable with Spotlight.

Some DT-specific metadata (e.g. labels) for exported documents/groups is stored in DEVONtech_storage files. Related topics:

Export/Import & “DEVONtech_storage”
Export/Import & “DEVONtech_storage”

Still puzzled why they don’t have a .plist (or any) extension, making it more convenient to identify/examine them as property lists.