Read XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition Online
Authors: Michael Kay
omit-xml-declaration optional | Attribute value template returning yes or no | Indicates whether an XML declaration is to be included in the output. |
standalone optional | Attribute value template returning yes , no , or omit | Indicates whether a standalone declaration is to be included in the output, and gives its value. |
undeclare-prefixes optional | Attribute value template returning yes or no | Indicates whether (with XML 1.1 output) namespaces should be undeclared using xmlns:p=“” when they go out of scope. |