diff --git a/src/compiler/GF/Compile/PGFtoJSON.hs b/src/compiler/GF/Compile/PGFtoJSON.hs
index 3fd3b60cb..e634dae67 100644
--- a/src/compiler/GF/Compile/PGFtoJSON.hs
+++ b/src/compiler/GF/Compile/PGFtoJSON.hs
@@ -81,16 +81,16 @@ concrete2json (c,cnc) = (showCId c,obj)
       , ("productions", JSON.makeObj [ (show cat, JSArray (map frule2json (Set.toList set))) | (cat,set) <- IntMap.toList (productions cnc)])
       , ("functions", JSArray (map ffun2json (Array.elems (cncfuns cnc))))
       , ("sequences", JSArray (map seq2json (Array.elems (sequences cnc))))
-      , ("startCats", JSON.makeObj $ map cats2json (Map.assocs (cnccats cnc)))
-      , ("totalFIds", mkJSInt (totalCats cnc))
+      , ("categories", JSON.makeObj $ map cats2json (Map.assocs (cnccats cnc)))
+      , ("totalfids", mkJSInt (totalCats cnc))
       ]
 
 cats2json :: (CId, CncCat) -> (String,JSValue)
 cats2json (c,CncCat start end _) = (showCId c, ixs)
   where
     ixs = JSON.makeObj
-      [ ("s", mkJSInt start)
-      , ("e", mkJSInt end)
+      [ ("start", mkJSInt start)
+      , ("end", mkJSInt end)
       ]
 
 frule2json :: Production -> JSValue
diff --git a/src/compiler/GF/Compile/pgf.schema.json b/src/compiler/GF/Compile/pgf.schema.json
index a8f31e399..2058e9a70 100644
--- a/src/compiler/GF/Compile/pgf.schema.json
+++ b/src/compiler/GF/Compile/pgf.schema.json
@@ -53,8 +53,8 @@
           "productions",
           "functions",
           "sequences",
-          "startCats",
-          "totalFIds"
+          "categories",
+          "totalfids"
         ],
         "properties": {
           "flags": {
@@ -106,26 +106,26 @@
               }
             }
           },
-          "startCats": {
+          "categories": {
             "type": "object",
             "additionalProperties": {
               "title": "CncCat",
               "type": "object",
               "required": [
-                "s",
-                "e"
+                "start",
+                "end"
               ],
               "properties": {
-                "s": {
+                "start": {
                   "type": "integer"
                 },
-                "e": {
+                "end": {
                   "type": "integer"
                 }
               }
             }
           },
-          "totalFIds": {
+          "totalfids": {
             "type": "integer"
           }
         }