Differences between 3.0.1 and 2.2.1 for ISO submission

[bact]

Draft - Based on text in https://github.com/spdx/using/blob/main/docs/diffs-from-previous-editions.md

Difference from the base-text

• "Properties Removed" and "Naming Differences" sections are converted to tables for easy comparison
• Fixed typos and wrong property names, as listed in Fix typos in diffs-from-previous-editions.md using#18
• Added new hash algorithms (from 2.3)
• Added info about the change of License matching to XML format (from 2.3)

To resolve #999

To be added

• Incorporate changes between 2.2.1 and 2.3 in
• V2.3-V2.2.2:
  • License matching is now using License List XML format
  • Added hash algorithms (SHA3-256, SHA3-384, SHA3-512, BLAKE2b-256,
    BLAKE2b-384, BLAKE2b-512, BLAKE3, ADLER32 )
  • PrimaryPackagePurpose is new in 2.3

Issues to be resolved

• In SPDX 2 File Type v SPDX 3 Content Type table, there's a mention of "text/spdx", it is tag:value SPDX file format which is not available in SPDX 3 yet.
  • How to deal with this?
  • We also don't have the IANA entry yet for the JSON format (see Expected media type for spdx json/xml documents  #577)
  • Easiest way is to delete it from the table, won't effect the section as it is just a given example among other examples.

Possible style

We may like to see examples from similar "diffs" in other ISO docs.

For example, ISO 13485:2016 - Medical devices - Quality management systems - Requirements for regulatory purposes has an "Annex A Comparison of content between ISO 13485:2003 and ISO 13485:2016" in a table format.

Clause in ISO 13485:2016	Comment on change compared with ISO 13485:2003
Foreword	— Clarifies ...
Introduction 0.1 General	— Includes ... — Explains ... — Alerts ...

[zvr]

I think the "changes" should start with much more general view, talking about how we went from SpdxDocument to general data, leaving behind the Package/File/Snippet types but introducing dozens of different elements, etc. etc.

I cleared the milestone because I don't think it's realistic to have this ready immediately.