---
title: lemma
framework: naturallanguage
role: symbol
role_heading: Type Property
path: naturallanguage/nltagscheme/lemma
---

# lemma

A scheme that supplies a stem form of a word token, if known.

## Declaration

```swift
static let lemma: NLTagScheme
```

## Discussion

Discussion For example, the stem of the English word “reading” is “read”.

## See Also

### Schemes

- [tokenType](naturallanguage/nltagscheme/tokentype.md)
- [lexicalClass](naturallanguage/nltagscheme/lexicalclass.md)
- [nameType](naturallanguage/nltagscheme/nametype.md)
- [nameTypeOrLexicalClass](naturallanguage/nltagscheme/nametypeorlexicalclass.md)
- [language](naturallanguage/nltagscheme/language.md)
- [script](naturallanguage/nltagscheme/script.md)
- [sentimentScore](naturallanguage/nltagscheme/sentimentscore.md)