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# QCCompositionProtocolRSSVisualizer

A  composition that acts as a visualizer for an RSS feed.  A conforming composition must use the input key [`QCCompositionInputRSSFeedURLKey`](/documentation/Quartz/QCCompositionInputRSSFeedURLKey) for the URL to use for the RSS feed. It can optionally use [`QCCompositionInputRSSArticleDurationKey`](/documentation/Quartz/QCCompositionInputRSSArticleDurationKey) to specify the duration of each feed article.

```
let QCCompositionProtocolRSSVisualizer: String
```

---

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