# Inheritance and Abstract Types There is **no** support for inheritance. Inheritance is a feature common in other programming languages, that allows including the fields and functions of one type in another type. Instead, follow the "composition over inheritance" principle, the idea of composing functionality from multiple individual parts, rather than building an inheritance tree. Furthermore, there is also **no** support for abstract types. An abstract type is a feature common in other programming languages, that prevents creating values of the type and only allows the creation of values of a subtype. In addition, abstract types may declare functions, but omit the implementation of them and instead require subtypes to implement them. Instead, consider using interfaces. --- # 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://max-daunarovich.gitbook.io/flow-network/introduction/composite-types/inheritance-and-abstract-types.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.