The technical implementation requires adding JSON-LD scripts to your page HTML, typically in the header section. Many content management systems, including WordPress, offer plugins that generate this markup automatically based on your content, eliminating the need for manual coding. For custom implementations, Schema.org provides documentation and examples for each data type.
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The subtlety: They had utilities which would produced formatted Basic listings and they would give example output of these utlities in their ads and catalogs. It was quite a while before I realized that most of those examples were not program excerpts, but complete programs which of course contained the Beagle Bros signature weirdness. And then there were the seemingly innocent hex dumps. My favorite was from the cover of one of their catalogs, which had a classic picture of this fellow sitting in a chair. On the floor next to him is a handbag with a piece of tractor paper sticking out. On the paper is a hex dump: 48 45 4C 50 21 20 and so on, which are ASCII codes that spell out the message: “HELP! GET ME OUT! I’M TRAPPED IN HERE!----SOPHIE”
// Changes to this file may cause incorrect behavior and will be lost if the code is regenerated.