# Design Issues Various concerns need to be addressed while modeling an ER diagram, such as: * Using an entity vs. using an attribute * Using an entity vs. using a relationship * Using a binary vs. an n-ary relationship * Placement of attributes among entities * Deciding strong and weak entity sets * Using specialization/generalization * Using aggregation --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://vikram-bajaj.gitbook.io/cs-gy-6083-principles-of-database-systems/main-1/the-entity-relationship-model-details/design-issues.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.