> For the complete documentation index, see [llms.txt](https://appmaster.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://appmaster.gitbook.io/docs/business-logic/block/models.md).

# Models

Set and store variables to be used throughout the business process.

Model blocks can store variables of data models to be used throughout the business process. You can set a value for the variable with a [Set Variable block](/docs/business-logic/block/logic/set-variable.md) or with a default value. You can then connect this variable as an input anywhere in the business process. Variaibles can be set as a single value or as an array.