The PNG spec [7] has been updated several times in 1996, 1998, 1999, and 2025.

The XPath spec [8] has multiple versions: 1.0 (1999), 2.0 (2007), 3.0 (2014), and 3.1 (2017), with 4.0 in development.

The RDF spec [9] has multiple versions: 1.0 (2004), and 1.1 (2014). Plus the related specs and their associated versions.

The schema.org metadata standard [10] is under active development and is currently on version 30.

[1] https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/... (New)

[2] https://web.dev/baseline/2025 -- popover API, plain text content editable, etc.

[3] https://web.dev/baseline/2024 -- exclusive accordions, declarative shadow root DOM

[4] https://web.dev/baseline/2023 -- inert attribute, lazy loading iframes

[5] https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/... (Baseline 2023)

[6] https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/... (2020)

[7] https://en.wikipedia.org/wiki/PNG

[8] https://en.wikipedia.org/wiki/XPath

[9] https://en.wikipedia.org/wiki/Resource_Description_Framework

[10] https://schema.org/