Fix the ontology IRI - Githubissues

Fix the ontology IRI from http://www.kgrid.org/koio to https://kgrid.org/koio by changing it as follows:

<rdf:RDF xmlns="https://kgrid.org/koio#"
     **xml:base="https://kgrid.org/koio"**
     xmlns:owl="http://www.w3.org/2002/07/owl#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:xml="http://www.w3.org/XML/1998/namespace"
     xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
     xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
     xmlns:dc="http://purl.org/dc/elements/1.1/">
    **<owl:Ontology rdf:about="https://kgrorg/koio"/>**

This will

sets the ontology IRI to https\://kgrid.org/koio by setting
sets the default namespace for the XML document to https\://kgrid.org/koio# by setting <rdf:RDF xmlns="https\://kgrid.org/koio#". This means that any element within the
element that does not have a prefix is considered to belong to this namespace. For example person in
```
<Person rdf:about="https\://kgrid.org/koio#John_Doe">
  <name>John Doe</name>
</Person>
```
set the base IRI for resolving relative IRIs within the XML document by setting xml:base="https\://kgrid.org/koio". This means that any relative IRIs used in the document will be resolved against this base IRI to form absolute IRIs. Relative IRIs are the ones which start with a # for example #person in
```
<owl:Class rdf:about="#Person"/>
```

Other options to consider are:

using '/' instead of '#' for default namespace and relative IRIs
using a version number in the ontology IRI like foaf ontology. This is usually used for ontologies that get updated quite often and older versions are regularly used in existing projects)

kgrid / koio

Fix the ontology IRI #23