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Elastic Docs ›Machine Learning in the Elastic Stack [8.16] ›Natural language processing

Limitations

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Limitations

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The following limitations and known problems apply to the 8.16.0 release of the Elastic natural language processing trained models feature.

ELSER semantic search is limited to 512 tokens per field that inference is applied to

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When you use ELSER for semantic search, only the first 512 extracted tokens from each field of the ingested documents that ELSER is applied to are taken into account for the search process. If your data set contains long documents, divide them into smaller segments before ingestion if you need the full text to be searchable.

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