One Hot Encoding Chapter 6

In the past I’ve seen one-hot encoding represented as a single high value and the rest of the values as a 0, but I noticed in chapter 6 of the fastbook, the book explains it as a list of zeros with a one in any position where that category is present.

Is this actually considered one-hot encoding since there is more than one high value or would this be a different type of encoding?

Wikipedia mentions that having multiple high values in a list is called a dummy variable rather than a one-hot encoding.

A one-hot encoding is important for single-label items to remove any appearance of ordinality where none exists. Dummy variables are similar but can have multiple high values representing the existence of each item.

“Is this actually considered one-hot encoding since there is more than one high value or would this be a different type of encoding?”

In the conventional sense, it isn’t. One-hot encoding is how you described it in the first paragraph, and has a long history from electronics.