https://www.openarchives.org/pipermail/oai-implementers/2011-September/002068.html
[OAI-implementers] same xml namespace declaration in header andpayload
xml namespacein headeroaiimplementersdeclaration
https://www.openarchives.org/pipermail/oai-implementers/2011-September/002070.html
[OAI-implementers] same xml namespace declaration in headerandpayload
xml namespaceoaiimplementersdeclaration
https://www.ibm.com/support/pages/apar/IV66661
IV66661: EXCLUSIVE XML CANONICALIZATION SHOWS UNEXPECTED NAMESPACE.
Error Message: When performing the XML-C14N standard serialization (http://www.w3.org/2001/10/xml-exc-c14n#) the
exclusivexmlcanonicalizationshowsunexpected
https://www.html.it/pag/16226/sintassi-dei-namespace/
Sintassi dei namespace | Guida XML di base | XML HTML.it
Dec 12, 2013 - Usare correttamente gli identificatori dei namespace nelle dichiarazioni
di basesintassideinamespaceguida
https://www.w3schools.com/Php/func_xml_set_end_namespace_decl_handler.asp
PHP xml_set_end_namespace_decl_handler() Function
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
phpxmlsetendnamespace
https://www.php.net/manual/de/function.xml-set-end-namespace-decl-handler.php
PHP: xml_set_end_namespace_decl_handler - Manual
Set up end namespace declaration handler
phpxmlsetendnamespace
https://www.php.net/manual/uk/function.xml-set-start-namespace-decl-handler.php
PHP: xml_set_start_namespace_decl_handler - Manual
Set up start namespace declaration handler
phpxmlsetstartnamespace