CSS Namespaces

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March 20 in Technology History: Standards, Patents and Breakthroughs

March 20, 2026
2014 On 20 March, a revised W3C Recommendation for CSS Namespaces Module Level 3 was published, defining the @namespace rule and a uniform prefix mechanism for namespace-qualified names in CSS-related specifications.
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Accelerometer Ambient Light Sensor Bitstring Status List v1.0 Controlled Identifiers v1.0 COSE CSS Lists and Counters Module Level 3 CSS Namespaces Module Level 3 CSS Shapes Module Level 1 CSS Speech Module CSS Writing Modes Level 3 Data Integrity ECDSA Cryptosuites v1.0 Data Integrity EdDSA Cryptosuites v1.0 Generic Sensor API Gyroscope Input Events Level 2 ISO 14001 ISO 22095-2 ISO 22095-3 ISO 45001 ISO 9001 ISO/TR 8344 Jan Ernst Matzeliger JOSE Magnetometer Manifest for Web Application Mariner G Microsoft Orientation Sensor Payment Method Identifiers RFC 37 RFC 38 RFC 486 Surface Duo 2 Surface Headphones Thomas Edison Verifiable Credential Data Integrity 1.0 Verifiable Credentials Data Model v2.0 W3C WAI-ARIA 1.0 User Agent Implementation Guide Windows 10 Windows Server 2016 Paris Rome CSS Lists CSS Shapes CSS Speech CSS Writing Io Voyager 1