Combining stemming and other vocabularies allows to get result to a user's query from both inflected forms of words and vocabularies equivalences or hierarchies, e.g., the pony query can match content containing little horses.
These are the main rules concerning stemming and other vocabularies (synonyms, taxonomies, thesauri) combination:
- All stemming dictionaries are applied to all other vocabularies.
- Stemming dictionaries are never applied to other stemming dictionaries.
- Vocabularies (synonyms, taxonomies, thesauri) are never applied to other vocabularies.
- All the vocabularies (stemming, synonyms, taxonomies, thesauri) are then applied on the documents, and more precisely the part of the documents indexed as full text, according to the configuration applied at indexing time.