There already are several Structured Data modules available for Zen Cart, but with this one you do not need to edit core files. Instead the data is generated through Json files

A PHP implementation of schema.org structured data objects

JSON Structuring Markup is simply the easiest solution to add valid schema.org as a JSON script in the head of posts and pages. The provided LD-JSON is validated from the google structured data.

Automatically generate Schema.org JSON-LD markup for WordPress content.

MSU Library has created a digital video library using the Youtube API to power our local library channel. It is a complete search and browse app with item level views, microdata, a caching and optimization routine, and a file backup routine. The article will discuss applying the YouTube API as a database application layer, workflow efficiencies …

Extract JSON-LD events from webpages

Agata Mac | Landing Page | Seguro Saúde Geral

Site Institucional de Ateliê de Costura de Figurinos e Cenários

Fardas Guará | Site / Catálogo | Moda

Algorithm collection of using PHP

Yet another custom WordPress theme by Benjamin Kaminski Consultinrg.

Simple, no configuration module that adds relevant structured data to a Magento shop.

SCHEMA for Article is simply the easiest solution to add valid schema.org as a JSON script in the head of blog posts or posts. The provided LD-JSON is validated from the google structured data.

Source code about data structure algorithm with PHP

A MediaWiki extension that allows creating machine-readable navigation templates. NOTE: this extension's source code is now hosted on Wikimedia!

PHP implementation of bencoding, an encoding algorithm used by the peer-to-peer file sharing system BitTorrent for storing and transmitting loosely structured data

WordPress plugin to remove all Schema Markup (Microdata, RDFa and/or JSON-ld) that you don’t want on your site.

WordPress plugin for custom JSON-ld schema markup within WordPress posts & pages.

An SEO add-on for Statamic.