What makes a traditional baguette?

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I'm trying to get an understanding of what, exactly, makes a traditional baguette. Most of the research I've done indicates that the ingredients must only be wheat flour, water, yeast, and salt, that there is a required length, and that the baking must be done by hand. That said, most of the recipes I've seen are more limited than what the rules allow for.

Is a baguette considered traditional if it has...

- A combination of white flour and whole wheat flour instead of just white flour, or must it be all white flour?

- Sourdough starter instead of commercial yeast?

 

Is there anything else I'm missing here?

Interesting. I thought that there would be more in there about the sizes and shapes of the different loaves. I guess that a baguette made with entirely whole wheat flour could still be called traditional.