> For the complete documentation index, see [llms.txt](https://docs.infotopics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.infotopics.com/trulyp/writebackextreme/schemas.md).

# Schemas

A schema is the heart of every WriteBackExtreme use case. It defines the form people fill in from Tableau (the fields and their types), the database table where the data is stored, and the rules around it: [permissions](/trulyp/writebackextreme/schemas/schema-permissions.md), [row-level security](/trulyp/writebackextreme/schemas/row-level-security.md), [workflows](/trulyp/writebackextreme/workflows.md) and [audits](/trulyp/writebackextreme/schemas/audits.md).

You manage schemas in **WriteBackExtreme** › **Schemas**.

<figure><img src="https://2312557015-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWbWxEBax8PKTjFYRLWgi%2Fuploads%2Fgit-blob-ee2704f5f88d09772cf36d52b6cc2f692a82f9a0%2FWBE_Schemas_List.png?alt=media" alt=""><figcaption><p>WriteBackExtreme › Schemas</p></figcaption></figure>

The list shows each schema's **Label** and description, its number of fields (**# Fields**), whether **RLS** (row-level security) is on, its **Connection** and its **Source**.

### Filters

* **Source**: where the schema comes from. The list shows **WriteBackExtreme** schemas by default. Schemas can also be created elsewhere in Trulyp: by **Analytics** (when you [import an Excel or CSV file](/trulyp/analytics/create-an-app.md)), **SuperTables** or **PowerKPIs**.
* **Type**: **Add Data**, **Data Correction**, **DataHelper** or **Collaboration**.
* **Connection**: the connection the schema uses.

<figure><img src="https://2312557015-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWbWxEBax8PKTjFYRLWgi%2Fuploads%2Fgit-blob-2fbba6c1d4266c12d1cc56aa29607a38c6a11fce%2FWBE_Schemas_Source_Filter_Open.png?alt=media" alt=""><figcaption></figcaption></figure>

### Work with schemas

* **Create new schema**: see [Create a schema](/trulyp/writebackextreme/schemas/create-a-schema.md).
* **Import**: import a schema that was exported from another environment. See [Import/export](/trulyp/writebackextreme/schemas/import-export.md).
* Click a schema, or its pencil, to [edit it](/trulyp/writebackextreme/schemas/edit-a-schema.md).
* Click **⋯** for **Export**, **Duplicate** and **Delete**.

<figure><img src="https://2312557015-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FWbWxEBax8PKTjFYRLWgi%2Fuploads%2Fgit-blob-77193af8a8dafa84b0e50276d8b17fd5092e1e96%2FWBE_Schemas_Menu.png?alt=media" alt=""><figcaption></figcaption></figure>

## What kind of schema should you use?

Choose a type based on **what you want people to do with data in Tableau**. Click a use case for examples.

| If you want to...                                                                                                                                                | Use                                  |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
| [Add targets, forecasts, scenarios, or other new records](/trulyp/writebackextreme/schemas/what-type-of-schema/add-targets-goals-or-new-records.md)              | **Add Data**                         |
| [Correct or update existing data](/trulyp/writebackextreme/schemas/what-type-of-schema/correct-or-update-existing-data.md)                                       | **Data Correction**                  |
| [Maintain helper tables, mappings, lists, or supporting data](/trulyp/writebackextreme/schemas/what-type-of-schema/maintain-helper-tables-or-supporting-data.md) | **DataHelper**                       |
| [Discuss and annotate data](/trulyp/writebackextreme/schemas/what-type-of-schema/discuss-and-annotate-data.md)                                                   | **Collaboration** *(Add Data addon)* |


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