Final answer:
The question pertains to various attribute types in database schema design, including simple, composite, multi-valued, and derived attributes.
Step-by-step explanation:
The question asks about different a)attribute types that are found in database schema design.
Simple attributes are those with an atomic value, meaning they cannot be divided into smaller parts. Composite attributes are made up of multiple components, which means they can be divided into smaller sub-attributes. Multi-valued attributes can have multiple values for a single attribute, which is often represented by a double-circled notation in an Entity-Relationship diagram. Lastly, derived attributes are those that can be calculated or obtained from other attributes, often indicated by a dotted-line.