Currently dif-to-mmd looks for matching "Last_DIF_Revision_Date" and within that template is looking also for DIF_Creation_Date. In case of having only the creation date, the section is bypassed. We need to change:
xsl:apply-templates select="dif:Last_DIF_Revision_Date" to
xsl:apply-templates select="dif:Last_DIF_Revision_Date|dif:DIF_Creation_Date"
Currently dif-to-mmd looks for matching "Last_DIF_Revision_Date" and within that template is looking also for DIF_Creation_Date. In case of having only the creation date, the section is bypassed. We need to change: xsl:apply-templates select="dif:Last_DIF_Revision_Date" to xsl:apply-templates select="dif:Last_DIF_Revision_Date|dif:DIF_Creation_Date"
and the same for the template.