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The hierarchical facet, where you can find the documentation here, works with fields representing a path tokenization, where each value is prefixed by its depth level. For example, the path '/home/france/labs' will be tokenized as this :
Tokens |
|---|
0/home |
1/home/france |
2/home/france/labs |
Before v5.1, you had to code yourself a “hierarchical tokenizer”. In v5.1 we have implemented a “ready to use” tokenizer which is configurable through some parameters of the Datafari Update Processor in the solrconfig.xml file of the FileShare core: [DATAFARI_HOME]/solr/solrcloud/FileShare/conf/solrconfig.xml
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Once your documents indexed with either our hierarchical tokenizer or yours, you can set the hierarchical facet widget in the search UI by following the documentation : Widgets and Modules