How to exclude the name space from xslt result?

One of my colleague asked me how to avoid the result xml file include the annoying name space from the elements when you are using xsl:copy.
Here is the solution:
add exclude-result-prefixes="saxon v00" into your xsl:stylesheet element in your xsl file.

omit-xml-declaration specifies whether the XSLT processor should output an XML declaration; the value must be yes or no. Please refer to here.