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Why Retrieve Metadata?

Retrieving metadata is optional for a connector to work. On the other hand, to maximize its usefulness and make it easier to search the crawled documents, it is essential to retrieve metadata.

To customize the interface in order to add new fields and facets, the documents must have metadata; otherwise there are no values in the fields. Hence, the documents are not displayed when selecting a facet as there is no data to differentiate them.