[2]文法単語の組合せによる意味のまとまりの一つ。 sentence

[1] XQuery and XPath Full Text 3.0 ( 版) <http://www.w3.org/TR/2015/REC-xpath-full-text-30-20151124/#SentenceDef>

A sentence is an ordered sequence of any number of tokens. Beyond that, sentences are implementation-defined. A tokenizer is not required to support sentences.