rewrite xpath

to fix strange issue where 0 results would be returned if another filter facet was applied next to "occupation" for orgs.

modules/query.xqm

@@ -338,7 +338,7 @@ declare function query:get-facets($collection as node()*, $facet as xs:string) a
     case 'librettists' return $collection//mei:persName[@role='lbt']/@codedval
     case 'composers' return $collection//mei:persName[@role=('cmp','aut')]/@codedval
     case 'docSource' return $collection/tei:person/@source
-    case 'occupations' return $collection//tei:occupation | $collection//tei:label[.='Art der Institution']/following-sibling::tei:desc
+    case 'occupations' return $collection//tei:occupation | $collection//tei:label[.='Art der Institution']/parent::tei:state/tei:desc
     case 'residences' return $collection//tei:settlement[parent::tei:residence]/@key | $collection//tei:label[.='Ort']/following-sibling::tei:desc/tei:settlement/@key
         (: index-keys does not work with multiple whitespace separated keys
             probably need to change to ft:query() someday?!