Add 3.21.26 chars with unknown reason

modules/fontane/teisimple-test.xql

@@ -666,7 +666,7 @@ declare
         fontane-simple:transform($node)
 };
 
-(: 3.21.24 CORRECTION MARKS :)
+(: 3.21.24+25 CORRECTION MARKS :)
 declare
     %test:name("Correction marks")
     (: TODO: find out why test doesn't work :)
@@ -687,4 +687,15 @@ declare
     
     function teisimple-test:analyze-correction-marks($node as element(*)) {
         fontane-simple:transform($node)
+};
+
+
+(: 3.21.26 UNCLEAR CHARACTERS :)
+declare
+    %test:name("Unclear characters")
+    %test:args("<seg xmlns=""http://www.tei-c.org/ns/1.0"" function=""unknown"">||</seg>") 
+    %test:assertEmpty    
+    
+    function teisimple-test:analyze-unclear($node as element(*)) {
+        fontane-simple:transform($node)
 };
\ No newline at end of file

modules/fontane/transform2teisimple.xqm

@@ -193,7 +193,8 @@ declare function fontane-simple:transform($nodes as node()*) as node()* {
                     local:keep-element($node)
             else if($node/@type = "auction_number" 
             or $node/@type = "cancel"
-            or $node/@type = "abort")
+            or $node/@type = "abort"
+            or $node/@function ="unknown")
                 then
                     ()
             else