[xsl] xalan encoding issues?

["Laura Jenkins" <xsl_list@xxxxxxxxxxx>]

Hello,
Can anyone tell me if there are any specific rules about the character 
encoding.
following are my questions.
1.Does Xalan allow all kinds of character encoding or just some specific 
encodings ?
2.If the encoding is not specified in the xml file, what does xalan assume 
as a default encoding?
3.If i do not specify the encoding in my xml file, and if the xml has for 
example arabic or polish characters,would it still open in my IE?(what would 
IE assume the default Character coding )
4. If the XML file is has an encoding iso-8859-1 and if the xml is a valid 
xml, what is the effect of
 1. Having an xml declaration with encoding in the xsl??
 2. Having an xsl:output with encoding specified?

Thank you very much

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