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10 cards from this deck
Language fully described using regular expressions
Language using BNF/syntax diagrams for complex nested structures
Regular: simple linear; Context-free: complex hierarchical
Zero or more of preceding element
One or more of preceding element
Zero or one of preceding element (optional)
Every regex can be represented as FSM and vice versa
State indicating valid string match (shown with double circle)
Means 'is defined as' or 'can be replaced with'
Ovals: terminals; Rectangles: non-terminals
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