DCAT-AP aligment with DCAT 3.0

[bertvannuffelen]

This is an issue opened to announce the work on aligning DCAT-AP with DCAT 3.0.

In this issue general topics can be discussed. For specific topics we will use associated issues.

The alignment with DCAT 3.0 will result in a new release of DCAT-AP.

[bertvannuffelen]

Sub-issues are

• https://github.com/SEMICeu/DCAT-AP/issues/240
• https://github.com/SEMICeu/DCAT-AP/issues/241
• https://github.com/SEMICeu/DCAT-AP/issues/242
• https://github.com/SEMICeu/DCAT-AP/issues/243
• https://github.com/SEMICeu/DCAT-AP/issues/244
• https://github.com/SEMICeu/DCAT-AP/issues/246
• https://github.com/SEMICeu/DCAT-AP/issues/247