# enumerateTags(in:unit:scheme:options:using:) Enumerates over a given range of the string for a particular unit and calls the specified block for each tag. ``` func enumerateTags(in range: NSRange, unit: NSLinguisticTaggerUnit, scheme: NSLinguisticTagScheme, options: NSLinguisticTagger.Options = [], using block: (NSLinguisticTag?, NSRange, UnsafeMutablePointer) -> Void) ``` ## Parameters `range` The range to analyze. `unit` The linguistic unit. For possible values, see [`NSLinguisticTaggerUnit`](/documentation/Foundation/NSLinguisticTaggerUnit). `scheme` The tag scheme. For possible values, see [`NSLinguisticTagScheme`](/documentation/Foundation/NSLinguisticTagScheme). `options` The linguistic tagger options to use. See [`NSLinguisticTagger.Options`](/documentation/Foundation/NSLinguisticTagger/Options) for possible values. `block` The block to apply to ranges of the string. The block takes the following arguments: - tag: The located linguistic tag. - tokenRange: The range of the linguistic tag. - stop: A reference to a Boolean value. The block can set the value to to stop further processing of the set. The `stop` argument is an out-only argument. You should only ever set this Boolean to within the block. ## Discussion This method’s block is called for all tokens intersecting a given range, supplying tags and ranges. The tagger segments the string into sentences and tokens as necessary, and return those ranges along with a tag for any scheme in its array of tag schemes. For example, if the tag scheme is [`lexicalClass`](/documentation/Foundation/NSLinguisticTagScheme/lexicalClass), the tags specify the part of speech (for word tokens) or the type of whitespace or punctuation (for whitespace or punctuation tokens). If the tag scheme is [`lemma`](/documentation/Foundation/NSLinguisticTagScheme/lemma), the tags specify the stem form of the word (if known) for each word token. > Important: > This method enumerates over the ranges of all tokens that intersect the specified range. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)