# Responsible for HTML compliance with Document Type Definition standards

For example, a TABLE block element cannot be nested inside a P block element.

```js
Jodit.make('#editor', {
	dtd: {
    /**
     * Remove extra br element inside block element after pasting
     */
    removeExtraBr: true,

    /**
     * Check when inserting a block element if it can be inside another block element (according `blockLimits`)
     */
    checkBlockNesting: true,

    /**
     * List of elements that contain other blocks
     */
    blockLimits: {
      article: 1,
      aside: 1,
      audio: 1,
      body: 1,
      caption: 1,
      details: 1,
      dir: 1,
      div: 1,
      dl: 1,
      fieldset: 1,
      figcaption: 1,
      figure: 1,
      footer: 1,
      form: 1,
      header: 1,
      hgroup: 1,
      main: 1,
      menu: 1,
      nav: 1,
      ol: 1,
      section: 1,
      table: 1,
      td: 1,
      th: 1,
      tr: 1,
      ul: 1,
      video: 1
    }
  }
});
```
