- PostgreSQL full text search, space symbols, and lexemes
- asciiword | Word, all ASCII | C | {english_stem} | english_stem | {c}
- blank | Space symbols | # | {thesaurus_en,simple} | simple | {#}
- to_tsvector('english', my_transformer(document_text))
- ...
- to_tsquery('english', my_transformer(query_text))