date elements with no conformant attribute remain empty

[jjarosch]

When all attributes of the <date> element do not conform to the CMIF format, an empty <date> element with no attributes is generated. After checking the attributes, there needs to be another check if any one of them remains. If not, the entire <date> element needs to be discarded.

cmiferator/library-package/content/correspDesc-transform.xsl

Lines 106 to 109 in 0386d60

	<!-- TODO: when none of the attributes conform, the resulting date element is empty -->
	<xsl:if test="matches(., '^\d{4}(-\d{2}){0,2}$')">
	<xsl:copy/>
	</xsl:if>