## Added

* Core enhancement: Attestation
([#192](#192) via
[#348](#348))
* Core enhancement: Cryptography Bill of Materials — CBOM
([#171](#171),
[#291](#291) via
[#347](#347))
* Feature to express the URL to source distribution
([#98](#98) via
[#269](#269))
* Feature to express the URL to RFC 9116 compliant documents
([#380](#380) via
[#381](#381))
* Feature to express tags/keywords for services and components (via
[#383](#383))
* Feature to express details for component authors
([#335](#335) via
[#379](#379))
* Feature to express details for component and BOM manufacturer
([#346](#346) via
[#379](#379))
* Feature to express communicate concluded values from observed
evidences ([#411](#411)
via [#412](#412))
* Features to express license acknowledgement
([#407](#407) via
[#408](#408))
* Feature to express environmental consideration information for model
cards ([#396](#396) via
[#395](#395))
* Feature to express the address of organizational entities (via
[#395](#395))
* Feature to express additional component identifiers: Universal Bill Of
Receipts Identifier and Software Heritage persistent IDs
([#413](#413) via
[#414](#414))

## Fixed

* Allow multiple evidence identities by XML/JSON schema
([#272](#272) via
[#359](#359))
  This was already correct via ProtoBuff schema.
* Prevent empty `license` entities by XML schema
([#288](#288) via
[#292](#292))
  This was already correct in JSON/ProtoBuff schema.
* Prevent empty or malformed `property` entities by JSON schema
([#371](#371) via
[#375](#375))
  This was already correct in XML/ProtoBuff schema.
* Allow multiple `licenses` in `Metadata` by ProtoBuff schema
([#264](#264) via
[#401](#401))
  This was already correct in XML/JSON schema.

## Changed

* Allow arbitrary `$schema` values by JSON schema
([#402](#402) via
[#403](#403))
* Increased max length of `versionRange` (via
[`3e01ce6`](3e01ce6))
* Harmonized length of `version` (via
[#417](#417))

## Deprecated

* Data model "Component"'s field `author` was deprecated. (via
[#379](#379))
  Use field `authors` or field `manufacturer` instead.
* Data model "Metadata"'s field `manufacture` was deprecated.
([#346](#346) via
[#379](#379))
  Use "Metadata"'s field `component`'s field `manufacturer` instead. 
  - for XML: `/bom/metadata/component/manufacturer`
  - for JSON: `$.metadata.component.manufacturer`
  - for ProtoBuf: `Bom:metadata.component.manufacturer`

## Documentation

* Centralize version and version-range (via
[#322](#322))
* Streamlined SPDX expression related descriptions (via
[#327](#327))
* Enhanced descriptions of `bom-ref`/`refType`
([#336](#336) via
[#344](#344))
* Enhanced readability of enum documentation in JSON schema
([#361](#361) via
[#362](#362))
* Fixed typo "compliment" -> "complement" (via
[#369](#369))
* Added documentation for enum "ComponentScope"'s values in JSON schema
([#293](#293) via
[`d92e58e`](d92e58e))
  Texts were a taken from the existing ones in XML/ProtoBuff schema.
* Added documentation for enum "TaskType"'s values
([#245](#245) via
[#377](#377))
* Improve documentation for data model "Metadata"'s field `licenses`
([#273](#273) via
[#378](#378))
* Added documentation for enum "MachineLearningApproachType"'s values
([#351](#351) via
[#416](#416))
* Rephrased some texts here and there.

## Test data

* Added test data for newly added use cases
* Added quality assurance for our ProtoBuf schemas
([#384](#384) via
[#385](#385))