Attribute Grammars

Topics: attributes in grammar symbols; syntax-directed evaluation.

Synthesized attributes: passed from child nodes to parent nodes.

Inherited attributes: may be passed from parent- to child nodes or between siblings.

S-grammars: only synthesized attributes.

L-grammars: inherited attributes are only dependent on the parents' attributes or on the older brothers' (i.e., when evaluating left-to-right, only previously seen attributes are needed).