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Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...
The string "the dog ate the bone" was created using production rules that replaced non-terminal with terminal symbols. [1]In formal languages, terminal and nonterminal symbols are the lexical elements used in specifying the production rules constituting a formal grammar.