+ <!-- Node exists in input but not-or-empty in merge -->
+ <xsl:when test="$input-normal-mean and (not($merge-normal-mean) or $merge-normal-mean = '')">
+ <xsl:copy>
+ <xsl:apply-templates select="$input-normal-mean/@*" />
+ <xsl:apply-templates select="$input-normal-mean/node()" />
+ </xsl:copy>
+ </xsl:when>
+ <!-- Node doesn't exist or is empty in input and exists in merge -->
+ <xsl:when test="(not($input-normal-mean) or $input-normal-mean = '') and $merge-normal-mean">