Fwd: Feedback for https://w3c.github.io/dxwg/dcat/

​​
Thank you all who provided us with "Data Catalog Vocabulary (DCAT) -
revised edition
​ ​
W3C Editor's Draft 25 June 2018" https://w3c.github.io/dxwg/dcat/

I have read through the draft and there are some things that I'd like to
have clarified, please.  I have depended mainly on Figure 1, so I may have
missed things where I haven't fully understood the possibilities and
limitations of the vocab in practice.

*Services*
>From Figure 1 "Overview of DCAT model", it appears that
dcat:DiscoveryService inherits from dcat:DataDistributionService, so, a
DiscoveryService must also be a DataDistributionService.

Does this mean that a single Service endpointURL can be represented as a
combined discovery service and data distribution service, or as a data
distribution service alone, but not as a discovery service alone?  Does
this mean that we can't represent where a discovery service is also a data
transforming service, and or a data processing service (and also, or not, a
data distribution service)?

*Catalog*
I would have missed any discussion leading to the proposals to have Catalog
and CatalogRecord classes.  If this decided for sure?

*Resource*
Can Resource contain (zero to many) Resource?

Thank you,
Melanie