. "In software engineering, an entity\u2013relationship model (ER model) is a data model for describing the data or information aspects of a business domain or its process requirements, in an abstract way that lends itself to ultimately being implemented in a database such as a relational database. The main components of ER models are entities (things) and the relationships that can exist among them.Entity\u2013relationship modeling was developed by Peter Chen and published in a 1976 paper."@en . .