You can use the MDriven Gist site to upload a Model-Information-File (`.mif`) exported from MDriven Designer when you need to share model information.

1. MDriven Gist

1. 1. What it is for

The MDriven Gist site is a place for uploading Model-Information-Files (`.mif`) that you export from **MDriven Designer**.

A `.mif` file contains model information from your MDriven Designer model. For example, if you model classes such as `Customer` and `Order` and associate an order with its customer, you can export model information to a `.mif` file and upload that file to the Gist site.

1. 1. When to use it

Use the Gist site when you need to provide exported model information to another person or as part of a discussion about a MDriven model.

Typical use cases include:

- Sharing model information with another modeler. - Providing model information when asking for help with a model. - Making an exported snapshot of model information available for review.

1. 1. Before you upload

1. Open the model in **MDriven Designer**. 2. Export the model information to a file with the `.mif` extension. 3. Review the exported file and confirm that it is appropriate to share. 4. Upload the `.mif` file to the MDriven Gist site.

> **Important:** The available sources establish that the Gist site accepts exported `.mif` files, but they do not document the export command in MDriven Designer, the Gist site address, sign-in requirements, file visibility, or any file-size limits. Confirm these details with MDriven before relying on the site for confidential or production-related model information.

1. 1. Example

Suppose you are reviewing a sales model with a `Customer` class, an `Order` class, and an association showing that a customer can have orders. Export the model information from MDriven Designer as `SalesModel.mif`. You can then upload `SalesModel.mif` to the Gist site so that the exported model information can be shared for review.

1. 1. Related information

- Model-Driven Architecture — how MDriven uses the model as the core definition for derived artifacts. - Build Enterprise Information Systems — an iterative approach to defining classes, associations, state machines, and views. - Documentation:MDriven Developer's Guide: Model-Driven Development Simplified — an overview of model-driven development with MDriven. - Documentation:Using Github — guidance for using GitHub where source-control collaboration is required. - Training:Video Materials — available MDriven training materials.