Lemmatisation

Definition

Lemmatisation

Lemmatisation maps an inflected or variant word form to its dictionary headword, called its lemma, according to its grammatical role and context.

Grammatical Information

The same spelling can have different lemmas depending on whether it is used as a noun, verb or another part of speech. This grammatical information is often obtained through part-of-speech tagging.

Example

Inflected forms

The second mapping includes handling possessive forms.

Grammatical role

A sentence

The boy’s cars are different colours becomes the boy car be different colour. The result records base forms, not a grammatically rewritten sentence.