LexTag
— easy annotation and validation of word senses and concepts
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Create your semantically-annotated datasets with LexTag

LexTag is a user-friendly annotation interface that allows the user to annotate text (terms, sentences, documents) with meanings coming from existing knowledge graphs and dictionaries, such as WordNet, Wiktionary, WordAtlas, including domain-oriented resources, glossaries, online resource APIs and custom dictionaries of your choice.


You can use use LexTag to:

  • annotate text with meanings from any kind of dictionary
  • add, delete and edit word senses in the dictionary
  • monitor the annotation using different views and tools
  • manage your users and assign annotation tasks

User features


  • Select a word and assign the correct meaning from the inventory pane
  • Annotate the same dataset with multiple dictionaries at once
  • Group multiple words into multi-word expressions
  • Improve your dictionaries by adding, editing and removing senses
  • Expedite the tagging process by using keyboard shortcuts
  • Automatically skip function words
  • User-specific annotation preferences
  • Search by lemma and:
    • Use bulk annotation to assign a meaning to multiple occurrences
    • Leverage the two-level annotation process with silver and gold tags
    • Filter by sense, annotation level and status
  • and many more!
LexTag: annotation tool features
LexTag: annotation tool admin features

Admin features


  • Manage datasets and assign specific tasks to your users
  • Organize the annotation work into batches
  • Use your own custom dictionaries for annotation
  • Choose which settings to activate for each dataset
  • Import and export your data in a variety of formats: CONLL-U, JSON and JSONL (more can be made available)
LexTag: annotation tool admin features

How LexTag works

Import your data:
  • Select your preferred dictionary (e.g. WordAtlas, open or custom dictionaries)
  • Upload data in your preferred format
LexTag: data import feature
Create annotation tasks for your users:
  • Split your data into batches
  • Assign users to batches
  • Verify their completion status
LexTag: user task creation
Annotate batches:
  • Tag words with their most suitable meanings
  • Group words into new multiword expressions
  • Create, edit and delete the dictionary meanings dynamically
LexTag: user task creation
Export your annotated data:
  • Select the data you want to export
  • Choose your preferred format (CONLL-U, JSON, JSONL)
LexTag: user task creation

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