crowfoots
Crowfoots, also known as crow’s foot notation, are symbols used in entity-relationship diagrams to express the cardinality and participation of relationships between data entities. They are a common tool in relational database design and data modeling, valued for providing a compact visual summary of how entities relate to one another.
In crowfoot notation, each end of a relationship line carries a symbol that conveys how many instances
History and context: Crowfoot notation emerged in the 1970s as an accessible alternative to other ER diagram
Usage and interpretation: In practice, crowfoots are used to plan and document database schemas. A one-to-many
See also: entity-relationship model, crow’s foot notation, IDEF1X.