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JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

Cloudflare Server is a web server developed by Cloudflare.

World4You Internet Services is an Austrian web hosting provider owned by United Internet.

IONOS (formerly 1&1 IONOS and 1&1 Internet) is a European web hosting company owned by United Internet.

Cloudflare provides a content delivery network.

Cloudflare provides DNS servers and other web services.

World4You is an Austrian internet services provider owned by United Internet.

Gmail is the email service provided by Google.

World4You is an Austrian internet services provider owned by United Internet.

GlobalSign is an IT security service provider, also operating as SSL certificate authority.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Gzip (GNU zip) is a file compression algorithm.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

HTTP/2 is the second major version of the HTTP network protocol.

HTTP/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

City of Vienna (Wien), Austria