Hi
Share does not support multi-select faceting.
It is part of the search public API in 5.2 and on.
Here is a quick example
{ "query": { "query": "name:*" }, "includeRequest": true, "facetFormat": "V2", "facetQueries": [ {"query": "content.size:[0 TO 102400]", "label": "small", "group": "size"}, {"query": "content.size:[102400 TO 1048576]", "label": "medium", "group": "size"}, {"query": "content.size:[1048576 TO 16777216]", "label": "large", "group": "size"} ], "filterQueries": [{"queries": ["content.mimetype:\"text/plain\"", "content.mimetype:\"image/png\""], "tags": ["exclude"]}], "facetFields": {"facets": [{"field": "content.mimetype", "excludeFilters":["exclude"]}]}}
Andy