In the Core diagram https://spdx.github.io/spdx-spec/v3.0.1/images/model-Core.png, in the "Element" box (top center), the "extension: /Extension/Extension[0..1]" is changed to "extension: /Extension/Extension[0..]" (single character change, "1" -> "")
In the Core diagram https://spdx.github.io/spdx-spec/v3.0.1/images/model-Core.png, in the "Element" box (top center), the "extension: /Extension/Extension[0..1]" is changed to "extension: /Extension/Extension[0..]" (single character change, "1" -> "")