# Concept tiptap is a friendly wrapper around [ProseMirror](https://ProseMirror.net). Although tiptap tries to hide most of the complexity of ProseMirror, it’s built on top of its APIs and we recommend you to read through the [ProseMirror Guide](https://ProseMirror.net/docs/guide/) for advanced usage. ### Structure ProseMirror works with a strict [Schema](/api/schema), which defines the allowed structure of a document. A document is a tree of headings, paragraphs and others elements, so called nodes. Marks can be attached to a node, e. g. to emphasize part of it. [Commands](/api/commands) change that document programmatically. ### Content The document is stored in a state. All changes are applied as transactions to the state. The state has details about the current content, cursor position and selection. You can hook into a few different [events](/api/events), for example to alter transactions before they get applied. ### Extensions Extensions add [nodes](/api/nodes), [marks](/api/marks) and/or [functionalities](/api/extensions) to the editor. A lot of those extensions bound their commands to common [keyboard shortcuts](/api/keyboard-shortcuts). ## Vocabulary ProseMirror has its own vocabulary and you’ll stumble upon all those words now and then. Here is a short overview of the most common words we use in the documentation. | Word | Description | | ----------- | --------------------------------------------------------------------------------- | | Schema | Configures the structure your content can have. | | Document | The actual content in your editor. | | State | Everything to describe the current content and selection of your editor. | | Transaction | A change to the state (updated selection, content, …) | | Extension | Registeres new functionality. | | Node | Nodes are a type of content, for example a heading or a paragraph. | | Mark | One or multiple marks can be applied to nodes, for example for inline formatting. | | Command | Execute an action inside the editor, that somehow changes the state. | | Decoration | Styling on top of the document, for example to highlight mistakes. |