---
title: weakRelatedUniqueIdentifier
framework: corespotlight
role: symbol
role_heading: Instance Property
path: corespotlight/cssearchableitemattributeset/weakrelateduniqueidentifier
---

# weakRelatedUniqueIdentifier

The unique identifier for the item to which the activity is related, but not linked.

## Declaration

```swift
var weakRelatedUniqueIdentifier: String? { get set }
```

## Discussion

Discussion Unlike the similar relatedUniqueIdentifier property, this property does not link the lifetime of the item to the lifetime of the activity. In particular, deleting the item does not delete the activity.

## See Also

### Describing general attributes

- [alternateNames](corespotlight/cssearchableitemattributeset/alternatenames.md)
- [contentType](corespotlight/cssearchableitemattributeset/contenttype.md)
- [contentTypeTree](corespotlight/cssearchableitemattributeset/contenttypetree.md)
- [contentURL](corespotlight/cssearchableitemattributeset/contenturl.md)
- [darkThumbnailURL](corespotlight/cssearchableitemattributeset/darkthumbnailurl.md)
- [displayName](corespotlight/cssearchableitemattributeset/displayname.md)
- [keywords](corespotlight/cssearchableitemattributeset/keywords.md)
- [metadataModificationDate](corespotlight/cssearchableitemattributeset/metadatamodificationdate.md)
- [path](corespotlight/cssearchableitemattributeset/path.md)
- [rankingHint](corespotlight/cssearchableitemattributeset/rankinghint.md)
- [relatedUniqueIdentifier](corespotlight/cssearchableitemattributeset/relateduniqueidentifier.md)
- [thumbnailData](corespotlight/cssearchableitemattributeset/thumbnaildata.md)
- [thumbnailURL](corespotlight/cssearchableitemattributeset/thumbnailurl.md)
- [title](corespotlight/cssearchableitemattributeset/title.md)
- [domainIdentifier](corespotlight/cssearchableitemattributeset/domainidentifier.md)