has start date


The start date for a particular period relevant to the relationship.


pattern ([^\\.]*|([^\\.]*(\\.((\\d){1,3})){0,1}))(Z|\\+([01][0- 9]|2[0-3]):([0-5][0-9])|-([01][0-9]|2[0-3]):([0- 5][0-9]))

Values expected to be one of these types
RelationshipPeriodType
Used on these types
xsd:dateTimeStamp