@adobe/helix-pipeline/docs/section-definitions-section.md

(formerly known as Hypermedia Pipeline)

# Untitled undefined type in Section Schema

```txt
https://ns.adobe.com/helix/pipeline/section#/definitions/section
```




| Abstract            | Extensible | Status         | Identifiable | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                          |
| :------------------ | ---------- | -------------- | ------------ | :---------------- | --------------------- | ------------------- | ------------------------------------------------------------------- |
| Can be instantiated | No         | Unknown status | No           | Forbidden         | Forbidden             | none                | [section.schema.json\*](section.schema.json "open original schema") |

## section Type

unknown

# undefined Properties

| Property              | Type          | Required | Nullable       | Defined by                                                                                                                                                 |
| :-------------------- | ------------- | -------- | -------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [type](#type)         | Not specified | Optional | cannot be null | [Section](section-definitions-section-properties-type.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/type")          |
| [position](#position) | `object`      | Optional | cannot be null | [Section](section-definitions-section-properties-position.md "https://ns.adobe.com/helix/pipeline/position#/definitions/section/properties/position") |
| [children](#children) | `array`       | Optional | cannot be null | [Section](section-definitions-section-properties-children.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/children")  |
| [meta](#meta)         | Unknown Type  | Optional | can be null    | [Section](meta-definitions-meta.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/meta")                                |
| [title](#title)       | `string`      | Optional | cannot be null | [Section](meta-definitions-meta-properties-title.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/title")              |
| [intro](#intro)       | `string`      | Optional | cannot be null | [Section](meta-definitions-meta-properties-intro.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/intro")              |
| [image](#image)       | `string`      | Optional | cannot be null | [Section](meta-definitions-meta-properties-image.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/image")              |

## type

The MDAST node type. Each section can be treated as a standalone document.


`type`

-   is optional
-   Type: unknown
-   cannot be null
-   defined in: [Section](section-definitions-section-properties-type.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/type")

### type Type

unknown

### type Constraints

**constant**: the value of this property must be equal to:

```json
"root"
```

## position

Marks the position of an AST node in the original text flow


`position`

-   is optional
-   Type: `object` ([Position](section-definitions-section-properties-position.md))
-   cannot be null
-   defined in: [Section](section-definitions-section-properties-position.md "https://ns.adobe.com/helix/pipeline/position#/definitions/section/properties/position")

### position Type

`object` ([Position](section-definitions-section-properties-position.md))

## children

The AST nodes making up the section. Section dividers are not included.


`children`

-   is optional
-   Type: `object[]` ([MDAST](content-properties-mdast.md))
-   cannot be null
-   defined in: [Section](section-definitions-section-properties-children.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/children")

### children Type

`object[]` ([MDAST](content-properties-mdast.md))

## meta




`meta`

-   is optional
-   Type: `object` ([Details](meta-definitions-meta.md))
-   can be null
-   defined in: [Section](meta-definitions-meta.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/meta")

### meta Type

`object` ([Details](meta-definitions-meta.md))

## title

Extracted title of the document


`title`

-   is optional
-   Type: `string`
-   cannot be null
-   defined in: [Section](meta-definitions-meta-properties-title.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/title")

### title Type

`string`

## intro

Extracted first paragraph of the document


`intro`

-   is optional
-   Type: `string`
-   cannot be null
-   defined in: [Section](meta-definitions-meta-properties-intro.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/intro")

### intro Type

`string`

## image

Path (can be relative) to the first image in the document


`image`

-   is optional
-   Type: `string`
-   cannot be null
-   defined in: [Section](meta-definitions-meta-properties-image.md "https://ns.adobe.com/helix/pipeline/section#/definitions/section/properties/image")

### image Type

`string`

### image Constraints

**URI reference**: the string must be a URI reference, according to [RFC 3986](https://tools.ietf.org/html/rfc4291 "check the specification")