Help for ibm cert for XML

Hi
I am new to ur group i have booked for the exam this Monday
Pl can some one explain the correct answers.
Valid DTD
a) <!DOCTYPE SYSTEM SYSTEM "test.dtd">
<SYSTEM></SYSTEM>
b) <!DOCTYPE PUBLIC SYSTEM "test.dtd">
<PUBLIC></PUBLIC>
c) <!DOCTYPE PUBLIC PUBLIC "test.dtd">
<PUBLIC></PUBLIC>
d) <!DOCTYPE SYSTEM PUBLIC "test.dtd">
<PUBLIC></PUBLIC>
Ans a, b
Considering the code below, what should be placed at /// your code /// to output "My Text"?
--------XML document-----------------
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="MyTest.xsl"?>
<MyNode>
<MyText>My Text</MyText>
</MyNode>
--------XSL document-----------------
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/TR/WD-xsl" version="1.0">
<xsl:template match="/">
<html>
<body>
/// your code ///
</body>
</html>
</xsl:template>
</xsl:stylesheet>
Anw <xsl:value-of select="//MyNode"
What is wrong with
<xsl:value-of select="text()"/>