Collection (attribute of filter)
From JRapid
Use collection when you want to specify multiple values. Collection filters of entity type properties must specify widget combo (value of widget)
Example
Data model
This will bring all persons with checked educational levels
<entity label="Person" name="Person">
<property display="primary" label="Nombre" name="name"/>
<property entity="EducationalLevel" label="Educational Level" name="educationalLevel"/>
<filter collection="set" name="educationalLevels" property="educationalLevel" widget="checkbox"/>
</entity>
