create the geodcat-ap shacl file as an extension to the dcat-ap shacl file

[NielsHoffmann]

This is an issue relating to the GeoDCAT 3.0.0 pilot.

As is stated in the respec document the GeoDCAT profile is an extension to the DCAT-AP 3 profile.
For usability and maintainability purposes I would prefer that the GeoDCAT shacl file only contains the added shapes with respect to the DCAT-AP shacl file. So that it only reflects the extension to DCAT-AP.
Currently all shapes are 'redefined' using the GeoDCAT namespace:

DCAT-AP 3 Statement:

<https://semiceu.github.io/DCAT-AP/releases/3.0.0/shacl/dcat-ap-SHACL.ttl#dcat:CatalogShape/8f61614144aa7bca188b24f5976593dc08aad0e6> rdfs:seeAlso "https://semiceu.github.io/DCAT-AP/releases/3.0.0#Catalogue.description";
  shacl:description "A free-text account of the Catalogue."@en;
  shacl:minCount 1;
  shacl:name "description"@en;
  shacl:path dc:description .

GeoDCAT-AP statement:

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:CatalogShape/8f61614144aa7bca188b24f5976593dc08aad0e6> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Catalogue.description";
  shacl:description "A free-text account of the Catalogue."@en;
  shacl:minCount 1;
  shacl:name "description"@en;
  shacl:path dc:description .

In a lot of cases the statements are the same and the UUID between DCAT-AP and GeoDCAT-AP is the same. However, this is not always the case...

DCAT-AP 3 Statements on Spatial Resolution on a Dataset:

<https://semiceu.github.io/DCAT-AP/releases/3.0.0/shacl/dcat-ap-SHACL.ttl#dcat:DatasetShape/42110293925ce8bdb81f82dee95d1f78b2fca91c> rdfs:seeAlso "https://semiceu.github.io/DCAT-AP/releases/3.0.0#Dataset.spatialresolution";
  shacl:datatype xsd:decimal;
  shacl:description "The minimum spatial separation resolvable in a dataset, measured in meters."@en;
  shacl:name "spatial resolution"@en;
  shacl:path dcat:spatialResolutionInMeters .

<https://semiceu.github.io/DCAT-AP/releases/3.0.0/shacl/dcat-ap-SHACL.ttl#dcat:DatasetShape/46a60c7d3d828d3006937a12f82c1958b94e6f76> rdfs:seeAlso "https://semiceu.github.io/DCAT-AP/releases/3.0.0#Dataset.spatialresolution";
  shacl:description "The minimum spatial separation resolvable in a dataset, measured in meters."@en;
  shacl:name "spatial resolution"@en;
  shacl:nodeKind shacl:Literal;
  shacl:path dcat:spatialResolutionInMeters .

On GeoDCAT-AP the 'general' statements are there, and more specific statements:

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:DatasetShape/42110293925ce8bdb81f82dee95d1f78b2fca91c> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Dataset.spatialresolution";
  shacl:class <http://www.w3.org/ns/dqv#QualityMeasurement>;
  shacl:description "The performed quality measurements."@en;
  shacl:name "spatial resolution"@en;
  shacl:path <http://www.w3.org/ns/dqv#hasQualityMeasurement> .

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:DatasetShape/46a60c7d3d828d3006937a12f82c1958b94e6f76> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Dataset.spatialresolution";
  shacl:description "The performed quality measurements."@en;
  shacl:name "spatial resolution"@en;
  shacl:nodeKind shacl:BlankNodeOrIRI;
  shacl:path <http://www.w3.org/ns/dqv#hasQualityMeasurement> .

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:DatasetShape/69c4771d01c23b15f61b2d7006a4abf0d56d5ba0> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Dataset.spatialresolutioninmetres";
  shacl:description "The minimum spatial separation resolvable in a Dataset, measured in meters."@en;
  shacl:name "spatial resolution in metres"@en;
  shacl:nodeKind shacl:Literal;
  shacl:path dcat:spatialResolutionInMeters .

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:DatasetShape/8800b7f9f5c99f91633b1231bc40964e69b021de> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Dataset.spatialresolutionastext";
  shacl:description "Textual description of spatial resolution."@en;
  shacl:name "spatial resolution as text"@en;
  shacl:nodeKind shacl:Literal;
  shacl:path <http://data.europa.eu/930/spatialResolutionAsText> .

<https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#dcat:DatasetShape/a1173daef382ef9fe405318a57ddd98dbc82e335> rdfs:seeAlso "https://semiceu.github.io/GeoDCAT-AP/releases/3.0.0#Dataset.spatialresolutioninmetres";
  shacl:datatype xsd:decimal;
  shacl:description "The minimum spatial separation resolvable in a Dataset, measured in meters."@en;
  shacl:name "spatial resolution in metres"@en;
  shacl:path dcat:spatialResolutionInMeters .

Note that in this case the UUID of the DCAT-AP shapes are 're-used' for the more specific shapes, whereas the 'original' statements form DCAT-AP get 'new' UUID's.

I'm afraid that this makes the various profiles all rather unmaintainable.
In addition to this issue there seem to be discrepancies in the releases of DCAT-AP shacl files as noted here: SEMICeu/DCAT-AP#399