on this page:

https://docs.yoctoproject.org/ref-manual/terms.html

i think the definition of "container layer" is potentially confusing.
one reads:

"An example of a container layer is OpenEmbedded˘s meta-openembedded
layer"

  no, it's not -- it is simply a single git checkout containing
numerous (sub)layers, it is not *itself* a layer, containing neither
its own conf/ directory and layer.conf file and so on.

  i submit that an actual container layer would be, say,
meta-cloud-services:

https://git.yoctoproject.org/cgit/cgit.cgi/meta-cloud-services/tree/

or perhaps meta-security:

https://git.yoctoproject.org/cgit/cgit.cgi/meta-security/tree/

  thoughts?

rday