Add rdfs:label and skos:definition

[bact]

What this PR do

Implement #110 (Feedback from OMG - Item 5)

• Add rdfs:label, use info from element's name
• Add skos:definition, use info from summary
• Add skos:note, use info from description

Follow examples from https://www.omg.org/spec/Commons/1.1/PDF
(From examples, skos:scopeNote could be used for conformance information - not yet implemented here)

Output, with few Markdown markups removed: spdx-model.ttl.txt

Notes

Few Markdown markups are removed or transformed for readability.

Links are transformed

• [The EPSS Model](https://www.first.org/epss/model) -> The EPSS Model <https://www.first.org/epss/model>
• [Hash](../../Core/Classes/Hash.md) -> Hash
• [parameter](parameter.md) -> parameter

Inline code markups are removed

• Markdown:

  `relationshipType`="ancestorOf",
  
  `from` (is) (a) `RELATIONSHIP` `to`
  

• will be:

  relationshipType="ancestorOf",
  
  from (is) (a) RELATIONSHIP to
  

Code block markups are removed

• Markdown:

  `` `json
  {
    "type": "ai_EnergyConsumption"
  }
  `` `
  

• will be:

  {
    "type": "ai_EnergyConsumption"
  }
  

[zvr]

Unfortunately it's not that easy, since the "description" sections are in Markdown format, which means that they have be translated into a text only representation.

[bact]

Thank you. Just to clarify, since Markdown is also "text only" -- Do you mean specifically of removing the markups?
(something similar to https://gist.github.com/lorey/eb15a7f3338f959a78cc3661fbc255fe ?)

[bact]

Few Markdown markups that may interfere human reading are now removed. See Notes in the PR description for details.

This is also applied to rdfs:comment which contains Markdown markups from "Summary"/"Entries" sections.

New output: spdx-model.ttl.txt