diff --git a/amazonka-cloudsearch-domains.cabal b/amazonka-cloudsearch-domains.cabal
--- a/amazonka-cloudsearch-domains.cabal
+++ b/amazonka-cloudsearch-domains.cabal
@@ -1,5 +1,5 @@
 name:                  amazonka-cloudsearch-domains
-version:               0.3.4
+version:               0.3.5
 synopsis:              Amazon CloudSearch Domain SDK.
 homepage:              https://github.com/brendanhay/amazonka
 license:               OtherLicense
@@ -41,5 +41,5 @@
     other-modules:
 
     build-depends:
-          amazonka-core == 0.3.4.*
+          amazonka-core == 0.3.5.*
         , base          >= 4.7     && < 5
diff --git a/gen/Network/AWS/CloudSearchDomains/Search.hs b/gen/Network/AWS/CloudSearchDomains/Search.hs
--- a/gen/Network/AWS/CloudSearchDomains/Search.hs
+++ b/gen/Network/AWS/CloudSearchDomains/Search.hs
@@ -159,7 +159,14 @@
 -- specify search or filter criteria. You can also specify expressions as return
 -- fields.
 --
--- For more information about defining and using expressions, see <http://docs.aws.amazon.com/cloudsearch/latest/developerguide/configuring-expressions.html ConfiguringExpressions> in the /Amazon CloudSearch Developer Guide/.
+-- You specify the expressions in JSON using the form '{"EXPRESSIONNAME":"EXPRESSION"}'. You can define and use multiple expressions in a search request. For
+-- example:
+--
+-- ' {"expression1":"_score*rating", "expression2":"(1/rank)*year"} '
+--
+-- For information about the variables, operators, and functions you can use in
+-- expressions, see <http://docs.aws.amazon.com/cloudsearch/latest/developerguide/configuring-expressions.html#writing-expressions Writing Expressions> in the /Amazon CloudSearch Developer Guide/
+-- .
 s1Expr :: Lens' Search (Maybe Text)
 s1Expr = lens _s1Expr (\s a -> s { _s1Expr = a })
 
@@ -188,6 +195,26 @@
 -- values, the facets are sorted by facet count, and the top 10 facets are
 -- returned in the results.
 --
+-- To count particular buckets of values, use the 'buckets' option. For example,
+-- the following request uses the 'buckets' option to calculate and return facet
+-- counts by decade.
+--
+-- '{"year":{"buckets":["[1970,1979]","[1980,1989]","[1990,1999]","[2000,2009]","[2010,}"]}} '
+--
+-- To sort facets by facet count, use the 'count' option. For example, the
+-- following request sets the 'sort' option to 'count' to sort the facet values by
+-- facet count, with the facet values that have the most matching documents
+-- listed first. Setting the 'size' option to 3 returns only the top three facet
+-- values.
+--
+-- ' {"year":{"sort":"count","size":3}} '
+--
+-- To sort the facets by value, use the 'bucket' option. For example, the
+-- following request sets the 'sort' option to 'bucket' to sort the facet values
+-- numerically by year, with earliest year listed first.
+--
+-- ' {"year":{"sort":"bucket"}} '
+--
 -- For more information, see <http://docs.aws.amazon.com/cloudsearch/latest/developerguide/faceting.html Getting and Using Facet Information> in the /AmazonCloudSearch Developer Guide/.
 s1Facet :: Lens' Search (Maybe Text)
 s1Facet = lens _s1Facet (\s a -> s { _s1Facet = a })
@@ -220,6 +247,10 @@
 -- append to an occurrence of a search term. The default for HTML highlights is '&lt;/em&gt;'. The default for text highlights is '*'.   If no highlight options are
 -- specified for a field, the returned field text is treated as HTML and the
 -- first match is highlighted with emphasis tags: '&lt;em>search-term&lt;/em&gt;'.
+--
+-- For example, the following request retrieves highlights for the 'actors' and 'title' fields.
+--
+-- '{ "actors": {}, "title": {"format": "text","max_phrases": 2,"pre_tag": "","post_tag": ""} }'
 s1Highlight :: Lens' Search (Maybe Text)
 s1Highlight = lens _s1Highlight (\s a -> s { _s1Highlight = a })
 
@@ -248,7 +279,7 @@
 s1Query = lens _s1Query (\s a -> s { _s1Query = a })
 
 -- | Configures options for the query parser specified in the 'queryParser'
--- parameter.
+-- parameter. You specify the options in JSON using the following form '{"OPTION1":"VALUE1","OPTION2":VALUE2"..."OPTIONN":"VALUEN"}.'
 --
 -- The options you can configure vary according to which parser you use:
 --
diff --git a/gen/Network/AWS/CloudSearchDomains/Types.hs b/gen/Network/AWS/CloudSearchDomains/Types.hs
--- a/gen/Network/AWS/CloudSearchDomains/Types.hs
+++ b/gen/Network/AWS/CloudSearchDomains/Types.hs
@@ -42,6 +42,7 @@
     -- * Hit
     , Hit
     , hit
+    , hitExprs
     , hitFields
     , hitHighlights
     , hitId
@@ -213,7 +214,8 @@
     toJSON = toJSONText
 
 data Hit = Hit
-    { _hitFields     :: Map Text (List "fields" Text)
+    { _hitExprs      :: Map Text Text
+    , _hitFields     :: Map Text (List "fields" Text)
     , _hitHighlights :: Map Text Text
     , _hitId         :: Maybe Text
     } deriving (Eq, Read, Show)
@@ -222,6 +224,8 @@
 --
 -- The fields accessible through corresponding lenses are:
 --
+-- * 'hitExprs' @::@ 'HashMap' 'Text' 'Text'
+--
 -- * 'hitFields' @::@ 'HashMap' 'Text' ['Text']
 --
 -- * 'hitHighlights' @::@ 'HashMap' 'Text' 'Text'
@@ -232,9 +236,14 @@
 hit = Hit
     { _hitId         = Nothing
     , _hitFields     = mempty
+    , _hitExprs      = mempty
     , _hitHighlights = mempty
     }
 
+-- | The expressions returned from a document that matches the search request.
+hitExprs :: Lens' Hit (HashMap Text Text)
+hitExprs = lens _hitExprs (\s a -> s { _hitExprs = a }) . _Map
+
 -- | The fields returned from a document that matches the search request.
 hitFields :: Lens' Hit (HashMap Text [Text])
 hitFields = lens _hitFields (\s a -> s { _hitFields = a }) . _Map
@@ -249,7 +258,8 @@
 
 instance FromJSON Hit where
     parseJSON = withObject "Hit" $ \o -> Hit
-        <$> o .:? "fields" .!= mempty
+        <$> o .:? "exprs" .!= mempty
+        <*> o .:? "fields" .!= mempty
         <*> o .:? "highlights" .!= mempty
         <*> o .:? "id"
 
@@ -257,6 +267,7 @@
     toJSON Hit{..} = object
         [ "id"         .= _hitId
         , "fields"     .= _hitFields
+        , "exprs"      .= _hitExprs
         , "highlights" .= _hitHighlights
         ]