Editing Database design (section)

=== Conceptual schema ===
The information obtained can be formalized in a diagram or schema. At this stage, it is a [[conceptual schema]].

==== ER diagram (entity–relationship model) ====
[[Image:ER Diagram MMORPG.png|thumb|320px|A sample entity–relationship diagram]]

One of the most common types of conceptual schemas is the ER ([[entity–relationship model]]) diagrams.

Attributes in ER diagrams are usually modeled as an oval with the name of the attribute, linked to the entity or relationship that contains the attribute.

ER models are commonly used in information system design; for example, they are used to describe information requirements and / or the types of information to be stored in the database during the conceptual structure design phase.<ref>{{Cite journal |last1=Javed |first1=Muhammad |last2=Lin |first2=Yuqing |date=2018 |title=Iterative Process for Generating ER Diagram from Unrestricted Requirements |journal=Proceedings of the 13th International Conference on Evaluation of Novel Approaches to Software Engineering |publisher=SCITEPRESS – Science and Technology Publications |pages=192–204 |doi=10.5220/0006778701920204 |isbn=978-989-758-300-1 |doi-access=free}}</ref>