allow text content in <date>

[jjarosch]

cf. TEI-Correspondence-SIG/CMIF#37

Is a <date> with only text content and no attribute ok?

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

Lines 99 to 113 in 9cd62c0

	<xsl:template match="tei:date[1]">
	<!-- check if any of the dating attributes are present and not empty -->
	<xsl:if test="normalize-space(string-join(@when | @notBefore | @notAfter | @from | @to))">
	<date xmlns="http://www.tei-c.org/ns/1.0">
	<!-- only retain allowed attributes -->
	<xsl:for-each select="(@when | @notBefore | @notAfter | @from | @to)">
	<!-- only three types of notation are allowed – discard all others -->
	<!-- 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>
	</xsl:for-each>
	</date>
	</xsl:if>
	</xsl:template>