</foreignKey>
<field>
<name>start_date</name>
+ <uniqueName>relationship_start_date</uniqueName>
<type>date</type>
<title>Relationship Start Date</title>
<comment>date when the relationship started</comment>
</field>
<field>
<name>end_date</name>
+ <uniqueName>relationship_end_date</uniqueName>
<type>date</type>
<title>Relationship End Date</title>
<comment>date when the relationship ended</comment>