The function is used to search for articles. It duplicates the functionality of the functions lemma(), stem(), form(), partofspeech() allowing to write a query in a more concise way.

The function accepts single argument. When used without arguments, the function matches any article.

Documents matching the query.

article() = lemma(article) matches all articles in the text.

article(an) = partofspeech(article, an) matches all occurrences of the indefinite article "an".