sample_couch_map.js

function(doc) {
	var want = 'sshrsakey'
        if (doc.doc_type == 'SystemRecord') {
                if (doc.facter) {
			var facter = doc.facter
			for (var fact in facter) {
				if (fact == want) {
					emit(fact, doc.facter[fact])
				}
			}
                }
        }
}