I am wondering if there is a way to compare an attribute value with its default value defined in the DTD. Something like this:

<xsl:apply-templates select="*@[. != '{attribute's default val}']"/>

I would like to only output the attributes which are not the default value to make the outputted xml more readable. I have about 30 attributes but most of then are just set to their default values. Is there any way to reference the attribute's default value?