Site Info - Expatkey.com

Content Management Systems

WordPress is an open source blog publishing and content management system, based on PHP and MySQL.

Elementor is a WordPress-based website builder.

Server-side Programming Language

PHP is a scripting language for creating websites.

Client-side Programming Language

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

JavaScript Libraries

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Underscore is a JavaScript library that provides functional programming support.

Backbone is a JavaScript library providing a framework for defining models in applications.

Web Server

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Web Hosting Provider

Contabo is a German web hosting provider.

Data Center Provider

Contabo is a German web hosting provider.

DNS Server Provider

Contabo is a German provider of internet services.

Email Server Provider

Gmail is the email service provided by Google.

SSL Certificate Authority

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Traffic Analysis Tools

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

WordPress Jetpack Stats is a visitor tracking plugin for the WordPress publishing platform.

Advertising Network

The Google Advertising network consists of AdSense, DoubleClick and other services.

Tag Manager

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Social Widget

The WhatsApp share button allows users to share content with their WhatsApp contacts.

Site Elements

External Cascading Style Sheets define style rules in a separate CSS file.

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.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

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

Structured Data Formats

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.

Microdata is a specification to integrate metadata within existing content on web pages.

Markup Language

HTML5 is the fifth revision of the HTML standard.

Character Encoding

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

Image File Formats

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

Top Level Domain

Commercial entities

Server Location

Content Language