[1] XSL Transformations (XSLT) Version 3.0 (2017-06-06 21:59:56 +09:00) <https://www.w3.org/TR/2017/REC-xslt-30-20170608/#defining-decimal-format>

[2] XSL Transformations (XSLT) Version 3.0 (2017-06-06 21:59:56 +09:00) <https://www.w3.org/TR/2017/REC-xslt-30-20170608/#convert>