Regular Grammar - Extended Regular Grammars

Extended Regular Grammars

An extended right regular grammar is one in which all rules obey one of

  1. Ba - where B is a non-terminal in N and a is a terminal in Σ
  2. AwB - where A and B are in N and w is in Σ*
  3. A → ε - where A is in N and ε is the empty string.

Some authors call this type of grammar a right regular grammar (or right linear grammar) and the type above a strictly right regular grammar (or strictly right linear grammar).

An extended left regular grammar is one in which all rules obey one of

  1. Aa - where A is a non-terminal in N and a is a terminal in Σ
  2. ABw - where A and B are in N and w is in Σ*
  3. A → ε - where A is in N and ε is the empty string.

Some authors call this type of grammar a left regular grammar and the type above a strictly left regular grammar.

Read more about this topic:  Regular Grammar

Famous quotes containing the words extended, regular and/or grammars:

    Only very slowly and late have men come to realize that unless freedom is universal it is only extended privilege.
    Christopher Hill (b. 1912)

    It was inspiriting to hear the regular dip of the paddles, as if they were our fins or flippers, and to realize that we were at length fairly embarked. We who had felt strangely as stage-passengers and tavern-lodgers were suddenly naturalized there and presented with the freedom of the lakes and woods.
    Henry David Thoreau (1817–1862)

    A sure proportion of rogue and dunce finds its way into every school and requires a cruel share of time, and the gentle teacher, who wished to be a Providence to youth, is grown a martinet, sore with suspicions; knows as much vice as the judge of a police court, and his love of learning is lost in the routine of grammars and books of elements.
    Ralph Waldo Emerson (1803–1882)