how to match attributes in templates?

how to match attributes in templates?

this is what i'm doing to copy all nodes except for a specific element name. 
 how do i specify a specific attribute inthe if statement?
<xsl:template match="copytemp">
     <xsl:if test="not(name()='someelementname')">
         <xsl:copy-of select="."/>
     </xsl:if>
</xsl:template>

thanks in advance
a




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