---
title: SKIndexDocumentIteratorGetTypeID()
framework: Core Services
role: symbol
role_heading: Function
platforms: [macOS 10.3+]
path: coreservices/1443022-skindexdocumentiteratorgettypeid
---

# SKIndexDocumentIteratorGetTypeID()

Gets the type identifier for Search Kit document iterators.

## Declaration

```swift
func SKIndexDocumentIteratorGetTypeID() -> CFTypeID
```

## Return Value

Return Value A CFTypeID object containing the type identifier for the SKIndexDocumentIterator opaque type.

## Discussion

Discussion Search Kit represents document iterators with the SKIndexDocumentIterator opaque type. If your code needs to determine whether a particular data type is a document iterator, you can use this function along with the CFGetTypeID(_:) function and perform a comparison. Search Kit is thread-safe. You can use separate indexing and searching threads. Your application is responsible for ensuring that no more than one process is open at a time for writing to an index. Never hard-code the document iterator type ID because it can change from one release of macOS to another.

## See Also

### Managing Indexes

- [SKIndexAddDocumentWithText(_:_:_:_:)](coreservices/1444518-skindexadddocumentwithtext.md)
- [SKIndexAddDocument(_:_:_:_:)](coreservices/1444897-skindexadddocument.md)
- [SKIndexFlush(_:)](coreservices/1450667-skindexflush.md)
- [SKIndexCompact(_:)](coreservices/1443628-skindexcompact.md)
- [SKIndexGetDocumentCount(_:)](coreservices/1449093-skindexgetdocumentcount.md)
- [SKIndexGetMaximumDocumentID(_:)](coreservices/1444628-skindexgetmaximumdocumentid.md)
- [SKIndexGetMaximumTermID(_:)](coreservices/1444278-skindexgetmaximumtermid.md)
- [SKIndexDocumentIteratorCreate(_:_:)](coreservices/1446189-skindexdocumentiteratorcreate.md)
- [SKIndexDocumentIteratorCopyNext(_:)](coreservices/1442212-skindexdocumentiteratorcopynext.md)
- [SKIndexGetAnalysisProperties(_:)](coreservices/1443461-skindexgetanalysisproperties.md)
- [SKIndexMoveDocument(_:_:_:)](coreservices/1449899-skindexmovedocument.md)
- [SKIndexRemoveDocument(_:_:)](coreservices/1444375-skindexremovedocument.md)
- [SKIndexRenameDocument(_:_:_:)](coreservices/1448935-skindexrenamedocument.md)
- [SKIndexSetMaximumBytesBeforeFlush(_:_:)](coreservices/1448696-skindexsetmaximumbytesbeforeflus.md)
- [SKIndexGetMaximumBytesBeforeFlush(_:)](coreservices/1445329-skindexgetmaximumbytesbeforeflus.md)