In this section we describe each rule operator. Note that we exclude operators that are not germane to rules (such as $? , Section 21.6), and list only those that can be used in rules. Because all rule operators are symbolic, we cannot list them in alphabetical order, so, instead we list them in the alphabetical order of pronunciation. That is, for example, $@ (pronounced dollar-at) comes before $ : (pronounced dollar- colon ). To avoid confusion based on different ways of pronouncing symbols, we list all the operators in Table 18-3 so that you can easily find them. Table 18-3. Operators in rules
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