# What is the best way to define nested Parameters in Parameterized class

**URL:** <https://discourse.holoviz.org/t/what-is-the-best-way-to-define-nested-parameters-in-parameterized-class/2733>\
**Category:** Param\
**Created:** [August 29, 2021, 9:56pm UTC](https://discourse.holoviz.org/t/what-is-the-best-way-to-define-nested-parameters-in-parameterized-class/2733 "2021-08-29T21:56:59Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![JonathanMair](https://discourse.holoviz.org/user_avatar/discourse.holoviz.org/jonathanmair/32/4881_2.png) [@JonathanMair](https://discourse.holoviz.org/u/JonathanMair)\
**Post date:** [May 11, 2023, 7:09pm UTC](https://discourse.holoviz.org/t/what-is-the-best-way-to-define-nested-parameters-in-parameterized-class/2733/12 "2023-05-11T19:09:46Z")

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this question bears on the topic of this post…

> [@Accessing parameters of nested parameterized objects when displaying in panel](https://discourse.holoviz.org/t/accessing-parameters-of-nested-parameterized-objects-when-displaying-in-panel/5338):
>
> Hi All I’m quite new to panel and param and really like them. I’m trying to build an app that will be based on a moderately complicated data model, which I’m building in parameterized classes. These classes will sometimes be nested at various levels, but they should work independently too. This seems to be to be a very natural use case. I’ve expressed it quite abstractly, but for instance, if you have a Recipe object, it might have a list of Ingredient objects, and you might want to be able to …

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