X3D version 4.0 was approved by Web3D Consortium and ISO in 2023.[/X3D, diagnostic]
X3D version 4.0 offers many new features including interoperability with HTML5, glTF
2.0 Physically Based Rendering (PBR), and Web Audio API.[/X3D, diagnostic]
X3D/head/meta title (i.e. filename 'gears.x3d') is expected at end of identifier (url)
value [/X3D/head, warning]