[5] 名前空間。Namespace。
schema.*
NS:
[6] RDF 1.1 Concepts and Abstract Syntax ( (2014-04-26 05:18:11 +09:00 版)) https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#dfn-namespace
[7] Semantic Interpretation for Speech Recognition (SISR) Version 1.0 (2017-10-02 19:33:39 +09:00) https://www.w3.org/TR/semantic-interpretation/#SI7.3