[dxwg] Pull Request: A worked example to test the expressivity of ProfDesc

dr-shorthair has just submitted a new pull request for https://github.com/w3c/dxwg:

== A worked example to test the expressivity of ProfDesc ==
In this worked example I tried to create a description of ADMS as a _profile_ of DCAT. 
I found the following issues:

1. there is no predicate to link from an Implementation Resource Descriptor to the actual artefact - in some of the other examples `pd:resource` is used, but I believe this is overloading that predicate which links from a `Profile` to a `ImplResourceDesc`. The latter is an 'association class' which supports providing information about the nature and role of the artefact in the context of the profile. So I added `pd:artefact`

2. I do not understand what `pd:inheritedFrom` is to be used for. 

See https://github.com/w3c/dxwg/pull/355