Proposal: Add definitions for Individuals

[goneall]

To implement NONE and NOASSERTION values for complex types, we need a way to define Individual values.

An individual value is an instance of a Class with specified properties.

I would propose adding these into an Individuals folder.

The file format would be similar to the Vocabularies file format.

Below are proposed sections:

• Summary
• Description
• Metadata
• name within Metadata
• id within Metadata (the ID would be the namespace) followed by a unique ID
• type within Metadata
• propertyValues - any properties with pre-defined values. Currently, I only expect the ID's to be xsd:string types although we may need to extend these in the future.

[goneall]

@zvr - let me know any thoughts - we can implement this after RC

[zvr]

Sure.

Not even sure "name" is needed, to be honest.

Here's an example:

SPDX-License-Identifier: Community-Spec-1.0

# NoneCopyrightText

## Summary

Individual representing an assertion that no copyright text is present.

## Description

A NoneCopyrightText is the value that is used to indicate
that a software artifact does not contain any copyright information.

## Metadata

- id: NoneCopyrightText
- type: CopyrightText

## Property Values

- text: "NONE"

[goneall]

Not even sure "name" is needed, to be honest.

Agree - in fact for our use cases, we probably only need ID and Type.

[goneall]

Fixed in PR #456