New answers tagged refiner
Append this to your search: ContentType="Folder"
Actually separators are not used any longer in SharePoint 2013. The multivalue field needs to be populated using a List of items, e.g. List<string>. I'm using Content Enrichtment to populate my field using Property<List<string>> ; a good example from Microsoft: How to: Use the Content Enrichment web service callout for SharePoint Server ...
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