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# Synonyms, Hyponyms, and Hypernyms

You can use HPE QMS to expand queries to include other terms that are synonymous with the other query terms.

The synonym HPE QMS rules allow you to determine a set of keyword terms that the rule applies to, and then to specify how HPE QMS must expand the query. For example, you can use the following types of rules:

- Synonym rule. Include the original query term and add a list of synonymous terms. For example, you could expand a query for dog to a query for dog OR hound OR canine.
- Hyponym rule. Exclude the original query term, and replace it with a list of terms that are hyponyms of this term (that is, the original term could describe all the new terms). For example, you could replace a query for dog with a query for poodle OR retriever OR labrador and so on.
- Hypernym rule. Exclude the original query term, and replace it with a single term that is the hypernym of this term (that is, the new term could describe the original term). For example, you could replace a query for poodle with a query for dog.

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