ملخص: Synchronized extension systems (SE-systems, for short) are 4-tuples G = (V,L(1), L(2), S), where V is an alphabet and L(1), L(2) and S are languages over V, They generate languages extending L(1) by L(2) to the left or to the right, and synchronizing on words in S. Such systems appear naturally when considering stacks, queues, grammar-like generative devices, splicing systems, zigzag-codes etc.

لغة: إنجليزية