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%oasis.xmlns.attrname; OASIS Namespace Prefix Name

Constructs the OASIS namespace prefix to be used in the attribute-like definition for the namespace (%oasis.xmlns.attrib;); this construct uses “xmlns”, a colon, and the prefix “oasis” (defined in %oasis.prefix;)
Declaration
<!ENTITY % oasis.xmlns.attrname
                        "xmlns:%oasis.prefix;"                       >
Expanded Declaration

xmlns:oasis