Improve index look-up (relates to #139)

modules/fontane/index-api.xqm

@@ -4,6 +4,7 @@ xquery version "3.1";
  : given page.
  :
  : @author Mathias Göbel
+ : @author Michelle Weidling
  : @version 1.1
  : @since 2.5.6
  : :)
@@ -17,6 +18,7 @@ declare namespace tgmd="http://textgrid.info/namespaces/metadata/core/2010";
 declare namespace xhtml="http://www.w3.org/1999/xhtml";
 
 import module namespace config="http://textgrid.de/ns/SADE/config" at "../config/config.xqm";
+import module namespace functx = "http://www.functx.com";
 import module namespace ixp="http://fontane-nb.dariah.eu/index-processor" at "index-processor.xqm";
 import module namespace rest="http://exquery.org/ns/restxq";
 
@@ -221,7 +223,9 @@ declare
   %test:assertTrue
 function index:rendered-entity($id as xs:string)
 as item()* {
-    let $node := $ixp:dataCollection/id($id)
+    let $index-uris := ("253sx.xml", "253t0.xml", "253t1.xml", "253t2.xml", "253t3.xml")
+    let $indices := $ixp:dataCollection[functx:substring-after-last(base-uri(.), "/") = $index-uris]
+    let $node := $indices/id($id)
     let $type := $node/root()//tei:body/*[1]/local-name()
                 (: listEvent, listPlace, listOrg, listPerson or list :)
     return