CHAPTER 1 What is a data model?

How do I get there?Maps, blueprints, data modelsPlease show me the way

I gave the steering wheel a heavy tap with my hands as I realized that once again, I was completely lost. It was about an hour before dawn, I was driving in France, and an important business meeting awaited me. I spotted a gas station up ahead that appeared to be open. I parked, went inside, and showed the attendant the address of my destination.

I don’t speak French and the attendant didn’t speak English. The attendant did, however, recognize the name of the company I needed to visit. Wanting to help and unable to communicate verbally, the attendant took out a pen and paper. He drew lines for streets, circles for roundabouts along with numbers ...

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