+ <!-- Node exists but are empty on both sides -->
+ <xsl:when test="$input-pop = '' and $merge-pop = ''">
+ <xsl:copy>
+ <xsl:apply-templates select="$input-pop/@*" />
+ <xsl:apply-templates select="$input-pop/node()" />
+ </xsl:copy>
+ </xsl:when>
+ <!-- Node exists in input but not-or-empty in merge -->
+ <xsl:when test="$input-pop and (not($merge-pop) or $merge-pop = '')">