What's a Nonterminal?

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‌What's a Nonterminal?

A nonterminal is a placeholder, a stand-in for words, phrases, etc that are yet to be determined. The words a rule is a nonterminal that can be any rule; a number can be any number: not just a literal number such as 3.14, but a phrase resulting in a number, such as 3*3*2 or the square root of 25 or camera 1's field of view.

Nonterminals are always one word, eg a solvermode rather than a solver mode, as the latter creates too much confusion

Nonterminals come in both singular and plural forms: some trackers might be

all trackers on an object, where you see that some trackers is the plural form of a tracker , and that an object is suitable for a (singular) nonterminal starting with a vowel, as is conventional.

Exercise: what is the plural of mesh? How does Synthia know?

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