Play with XML and DTD 🪀

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XML: eXtensible Markup Language 📋.

DTD: Document Type Definition 📏.

Play with XML as store of data with DTD as grammar.
So, here we have three good exercises to practice XML with DTD;

• EX 01 ✔️: an example via a simple array represents a group of elements in XML.
• EX 02 ✔️: an example via an array represents a group of elements with some attributes in XML.
• EX 03 ✔️: an example of creating a SQL design in XML (idRefs / id ...etc).