Category Component 25.4
Category Component Help

# How Spelling Correction Works

To enable spell checking, set the parameters `SpellCheckMaxCheckTerms`, `SpellCheckIncorrectMaxDocOccs`, and `UnstemmedMinDocOccs` in the `[Server]` section of the configuration file before you index content. When you perform a query that includes ``SpellCheck`=True`, the Content component uses these settings in the spell checking process, as shown below:

1. Content determines if the query is eligible for spell checking.

   Content checks how many terms the query text contains (it ignores stop words, proper-name terms and hyphenated terms). If the number does not exceed the specified `SpellCheckMaxCheckTerms`, the query is eligible for spell checking.

2. Content determines which terms are misspelled.

   Content checks how many times each query term occurs in its data index. If a term occurs fewer times than the specified `SpellCheckIncorrectMaxDocOccs`, Content assumes that the term is misspelled.

3. Content finds correct spellings and suggests them.

   Content uses a proprietary term-distancing algorithm to find terms in its data index that are closest to the misspelled terms. It then checks how many times these terms occur. If a term occurs at least the specified number of `UnstemmedMinDocOccs` times, it uses it as a spell check suggestion.

   Content returns the corrected terms as a comma-separated list in an `<autn:spelling>` field. It also returns a corrected version of the query text in an `<autn:spellingquery>` field.

4. When you shut down the Content component, it creates a spelling correction file.

   The spelling correction file stores the corrections that you make. You can add further corrections to the file or amend existing corrections.

Related Topics

- Spelling Correction File

Copyright 2025 Open Text
Version 25.4 | Last updated October 2025

Send documentation feedback

Close

Send documentation feedback

To send feedback using your default email client, open an email window.

Otherwise, send your feedback and the information below to MFI-swpdl.idoldocsfeedback@opentext.com.

We appreciate your feedback!

Product: Knowledge Discovery Category Component 25.4

Topic Title: How Spelling Correction Works