Spacy Lemmatizer

The node converts all tokens to their root form (lemma), removing cases, plurals, conjugations, etc. Not all spaCy models contain lemmatizer.

If a model doesn't provide this functionality, a corresponding error is displayed upon configuration of the node.

Options

Select column: Select a Document column that will be affected by lemmatization.
Replace column: If checked, the document column will be replaced by the new preprocessed documents. Otherwise the preprocessed documents will be appended as a new column.
Append column: The name of the newly appended column, containing the preprocessed documents.

Python

Select one of Python execution environment options:

use default Python environment for the Redfield NLP nodes
use Conda environment specified by a Conda flow variable (only selectable if such a flow variable is available)

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To use this node in KNIME, install the extension Redfield NLP Nodes from the below update site following our NodePit Product and Node Installation Guide:

v5.9

Plugin provider: Redfield AB

Plugin version: 1.2.0.202512081822

On NodePit since: 2025-12-12

Last update: 2026-01-06

KNIME versions: v5.9, v5.8, v5.7, v5.6, v5.5, v5.4, v5.3, v5.1, v4.7

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