https://www.php.net/manual/es/domdocument.createattribute.php
PHP: DOMDocument::createAttribute - Manual
Crea un nuevo atributo
phpdomdocumentmanual
https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_456575866698.html
NetSuite Applications Suite - Document.createAttribute(options)
NetSuite Applications Suite
netsuiteapplicationsdocumentoptions