is part of https://github.com/CycloneDX/cyclonedx-php-library/milestone/1
as some interfaces/methods/signatures may change.

Work items:

• Add spec 1.4 schemas to schemas folder - via #65
• Add JSF schemas to schemas folder - used in draft 1.4 as a reference - via #65
• Add spec 1.4 schema validation - via #65
• Schema Change: Add support for bom.metadata.tools.tool.externalReferences-- #123
• Schema Change: Make bom.component.version optional - omit if empty/null
  • see existing issue #27
  • Fallback to version == '' for Schema Version < 1.4 when not provided
  • via #118
• component.cpe no longer deprecated - change inline comment for it in the code -- #119

not part of this milestone, yet

• Add support for bom.services
• Add support for bom.externalReferences
• Add support for bom.compositions
• Add support for bom.properties
• Add support for release-notes/releaseNotes
• Add support for vulnerabilities - see #16
• Add support fir JSON signature via JSF

this list was inspired (= copied from)
CycloneDX/cyclonedx-python-lib#67 (comment)