Proper description of Licenses

[igrangel]

The range of dcterms:license is the class dcterms:LicenseDocument. Values used with this property have to be instances of the class LicenseDocument and therefore non-literal values as in the following example.

1 - Create an instance of the license.

sto:GPLv2 a dcterms:LicenseDocument ;
  rdfs:comment "Published under Open Content License." ;
  skos:prefLabel "OCL 1.0" ;
  rdfs:seeAlso <https://opcfoundation.org/license/gpl.htm> .
```	

2 - Link the standard with the created instance by using the `dcterms:license` property.
`sto:IEC_62541 dcterms:license sto:GPLv2 ;`

Licenses of standards `MUST` be changed in this way.  

[sebbader]

What's the current state here? Do we still need it? See also licenses in ODRL. They offer several common licenses in LD and can order them in pretty cool ways.