# id.sifa.profile.presentation

> Published by [sifa.id](https://lexicon.garden/identity/did:plc:2f2ahswozqy4v5lvu676375y)

✓ This is the authoritative definition for this NSID.

## Description

A reusable presentation: the content a person presents (a talk, workshop, poster, or demo), independent of any single occasion on which it is delivered. Delivered at one or more id.sifa.profile.presentationDelivery occasions.

## Links

- [View on Lexicon Garden](https://lexicon.garden/lexicon/did:plc:2f2ahswozqy4v5lvu676375y/id.sifa.profile.presentation)
- [Documentation](https://lexicon.garden/lexicon/did:plc:2f2ahswozqy4v5lvu676375y/id.sifa.profile.presentation/docs)
- [Examples](https://lexicon.garden/lexicon/did:plc:2f2ahswozqy4v5lvu676375y/id.sifa.profile.presentation/examples)

## Definitions

### `id.sifa.profile.presentation`

**Type**: `record`

Record representing a single reusable presentation (the content), distinct from the occasions on which it is delivered.

**Key**: `tid`

| Property | Type | Required | Description |
|----------|------|----------|-------------|
| `links` | `array` | No | Canonical links for this content, such as slides or a recording. |
| `title` | `string` | Yes | Title of the presentation. |
| `duration` | `ref` → `#duration` | No | Typical length of the presentation, a fixed value or a range, in minutes. |
| `createdAt` | `string` (datetime) | Yes | Client-declared timestamp when this record was originally created. |
| `writeupRef` | `ref` → `id.sifa.defs#externalRecordRef` | No | Optional reference to a long-form write-up of this presentation (a pub.leaflet.document or site.standard.document holding video, transcript, or article). |
| `description` | `string` | No | Description or abstract of the presentation. |
| `intendedAudiences` | `array` | No | Intended audiences for this presentation, open text (e.g. 'Engineering leaders', 'Beginners'). |

### `id.sifa.profile.presentation#duration`

**Type**: `object`

A presentation length in minutes: a fixed value (minMinutes only) or a range (minMinutes to maxMinutes).

| Property | Type | Required | Description |
|----------|------|----------|-------------|
| `maxMinutes` | `integer` | No | Upper bound in minutes when the length is offered as a range. Omit for a fixed length. |
| `minMinutes` | `integer` | Yes | Length in minutes, or the lower bound when the length is offered as a range. |

## Raw Schema

```json
{
  "id": "id.sifa.profile.presentation",
  "defs": {
    "main": {
      "key": "tid",
      "type": "record",
      "record": {
        "type": "object",
        "required": [
          "title",
          "createdAt"
        ],
        "properties": {
          "links": {
            "type": "array",
            "items": {
              "ref": "id.sifa.defs#presentationLink",
              "type": "ref"
            },
            "maxLength": 20,
            "description": "Canonical links for this content, such as slides or a recording."
          },
          "title": {
            "type": "string",
            "maxLength": 3000,
            "minLength": 1,
            "description": "Title of the presentation.",
            "maxGraphemes": 300
          },
          "duration": {
            "ref": "#duration",
            "type": "ref",
            "description": "Typical length of the presentation, a fixed value or a range, in minutes."
          },
          "createdAt": {
            "type": "string",
            "format": "datetime",
            "description": "Client-declared timestamp when this record was originally created."
          },
          "writeupRef": {
            "ref": "id.sifa.defs#externalRecordRef",
            "type": "ref",
            "description": "Optional reference to a long-form write-up of this presentation (a pub.leaflet.document or site.standard.document holding video, transcript, or article)."
          },
          "description": {
            "type": "string",
            "maxLength": 50000,
            "description": "Description or abstract of the presentation.",
            "maxGraphemes": 5000
          },
          "intendedAudiences": {
            "type": "array",
            "items": {
              "type": "string",
              "maxLength": 1000,
              "maxGraphemes": 100
            },
            "maxLength": 20,
            "description": "Intended audiences for this presentation, open text (e.g. 'Engineering leaders', 'Beginners')."
          }
        }
      },
      "description": "Record representing a single reusable presentation (the content), distinct from the occasions on which it is delivered."
    },
    "duration": {
      "type": "object",
      "required": [
        "minMinutes"
      ],
      "properties": {
        "maxMinutes": {
          "type": "integer",
          "minimum": 1,
          "description": "Upper bound in minutes when the length is offered as a range. Omit for a fixed length."
        },
        "minMinutes": {
          "type": "integer",
          "minimum": 1,
          "description": "Length in minutes, or the lower bound when the length is offered as a range."
        }
      },
      "description": "A presentation length in minutes: a fixed value (minMinutes only) or a range (minMinutes to maxMinutes)."
    }
  },
  "$type": "com.atproto.lexicon.schema",
  "lexicon": 1,
  "description": "A reusable presentation: the content a person presents (a talk, workshop, poster, or demo), independent of any single occasion on which it is delivered. Delivered at one or more id.sifa.profile.presentationDelivery occasions."
}
```