  This work proposes a WebXR-based cross-platform conceptual architecture,
leveraging the A-Frame and Networked-Aframe frameworks, in order to facilitate
the development of an open, accessible, and interoperable metaverse. By
introducing the concept of spatial web app, this research contributes to the
discourse on the metaverse, offering an architecture that democratizes access
to virtual environments and extended reality through the web, and aligns with
Tim Berners-Lee's original vision of the World Wide Web as an open platform in
the digital realm.
