# Vocabulary

> Blueprint, stratum, vellum, folium, podium, atrium and portfolio are the seven words the rest of the product is built from.

Blueprintr uses a small number of made-up words. They are all names for
ordinary things.

![blueprint:josh/how-blueprintr-fits-together](https://blueprintr.io/embed/josh/how-blueprintr-fits-together#h=540)

| Word | What it is |
| --- | --- |
| **Blueprint** | The published unit. One or more tabs, at least one of which is a diagram, plus the prose and files around it. |
| **Vellum** | The diagram editor. Also the default engine for any new diagram. |
| **Stratum** | Detail bound to one shape on a diagram. Click the shape, the detail opens. |
| **Folium** | A multi-page documentation site with a nav tree and an automatic contents list. This guide is a folium. |
| **Podium** | A diagram presented as slides. |
| **Atrium** | An organisation's searchable homepage: its blueprints, foliums and people in one place. |
| **Portfolio** | A folder for related content. Portfolios hold blueprints, diagrams, links, notes, and other portfolios. |

## How they relate

You draw in **Vellum**. The drawing becomes a diagram tab inside a
**blueprint**. Shapes on that diagram carry **strata**. The blueprint is filed
in a **portfolio** and published once. The same content is then readable on
your profile, in an **Atrium**, embedded in a **folium**, or presented as a
**podium**.

> [!NOTE]
> A diagram does not have to be a blueprint. Standalone diagrams sit under
> **Dashboard → Diagrams** and can be embedded anywhere a blueprint can.

## Compendium and Continuum

**Compendium** is the [template library](/foliums/blueprintr-user-guide/blueprints/templates-and-the-compendium).
[**Continuum**](/foliums/blueprintr-user-guide/continuum) connects a diagram to a
live cloud account so the drawing can be checked against what exists.