WhichXSLifstatementchecksfortheexistenceofahomepageattributewithinanSTSUniversal
A.<xsl:iftest="//stsuuser:AttributeList/stsuuser:Attribute[attr=‘homepage‘]">
B.<xsl:iftest="//stsuuser:AttributeList/stsuuser:Attribute[@name=‘homepage‘]">
C.<xsl:if-exists="//stsuuser:AttributeList/stsuuser:Attribute/custom:Homepage">
D.<xsl:if-exists="//stsuuser:AttributeList/stsuuser:Attribute[@name=‘homepage‘])>
正确答案：参考B
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