diff --git a/BlastHTTP.cabal b/BlastHTTP.cabal
--- a/BlastHTTP.cabal
+++ b/BlastHTTP.cabal
@@ -7,7 +7,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.0.1
+version:             1.0.0
 synopsis:            Libary to interface with the NCBI blast REST interface
 description:         Searches for a provided nucleotide or protein sequence with the NCBI Blast REST service and returns a blast result in xml format as BlastResult datatype. 
                      .
@@ -33,8 +33,8 @@
 
 source-repository this
   type:     darcs
-  location: https://github.com/eggzilla/BlastHTTP/tree/v0.0.1
-  tag:      v0.0.1
+  location: https://github.com/eggzilla/BlastHTTP/tree/v1.0.0
+  tag:      v1.0.0
 
 library
   -- Modules exported by the library.
diff --git a/src/Bio/BlastHTTP.hs b/src/Bio/BlastHTTP.hs
--- a/src/Bio/BlastHTTP.hs
+++ b/src/Bio/BlastHTTP.hs
@@ -38,7 +38,8 @@
   { program :: Maybe String
   , database :: Maybe String
   , querySequence :: Maybe SeqData
-  , entrezQuery :: Maybe String }
+  , optionalArguments :: Maybe String 
+  }
   deriving (Show, Eq)
 
 -- | Parse HTML results into Xml Tree datastructure
@@ -54,16 +55,16 @@
       
 -- | Send query and parse RID from retrieved HTML 
 startSession :: String -> String -> String -> Maybe String -> IO String
-startSession program database querySequence entrezQuery = do
+startSession program database querySequence optionalArguments = do
   requestXml <- withSocketsDo
-      $ sendEntrezQuery program database querySequence entrezQuery
+      $ sendQuery program database querySequence optionalArguments
   let requestXMLString = L8.unpack requestXml
   CM.liftM head (runX $ parseHTML requestXMLString //> atId "rid" >>> getAttrValue "value")
   
--- | Send query with or without Entrez query and return response HTML
-sendEntrezQuery :: String -> String -> String -> Maybe String -> IO L8.ByteString
-sendEntrezQuery program database querySequence entrezQuery 
-  | isJust entrezQuery = simpleHttp ("http://www.ncbi.nlm.nih.gov/blast/Blast.cgi?CMD=Put&PROGRAM=" ++ program ++ "&DATABASE=" ++ database ++ "&QUERY=" ++ querySequence ++ "&ENTREZ_QUERY=" ++ fromJust entrezQuery)
+-- | Send query with or without optional arguments and return response HTML
+sendQuery :: String -> String -> String -> Maybe String -> IO L8.ByteString
+sendQuery program database querySequence optionalArguments
+  | isJust optionalArguments = simpleHttp ("http://www.ncbi.nlm.nih.gov/blast/Blast.cgi?CMD=Put&PROGRAM=" ++ program ++ "&DATABASE=" ++ database ++ fromJust optionalArguments ++ "&QUERY=" ++ querySequence)
   | otherwise = simpleHttp ("http://www.ncbi.nlm.nih.gov/blast/Blast.cgi?CMD=Put&PROGRAM=" ++ program ++ "&DATABASE=" ++ database ++ "&QUERY=" ++ querySequence)
          
 -- | Retrieve session status with RID
@@ -102,28 +103,27 @@
       return (Left exceptionMessage)
   | otherwise = checkSessionStatus rid counter
 
-
 -- | Sends Query and retrieves result on reaching READY status, will return exeption message if no query sequence has been provided 
 performQuery :: String -> String -> Maybe SeqData -> Maybe String -> Int -> IO (Either String BlastResult)                               
-performQuery program database querySequenceMaybe entrezQueryMaybe counter
+performQuery program database querySequenceMaybe optionalArgumentMaybe counter
   | isJust querySequenceMaybe = do 
-     rid <- startSession program database (L8.unpack (unSD (fromJust querySequenceMaybe))) entrezQueryMaybe
+     rid <- startSession program database (L8.unpack (unSD (fromJust querySequenceMaybe))) optionalArgumentMaybe
      checkSessionStatus rid counter
   | otherwise = do 
      let exceptionMessage = "Error - no query sequence provided"
      return (Left exceptionMessage)
 
 -- | Retrieve Blast results in BlastXML format from the NCBI REST Blast interface
--- The querySequence has to be provided, all other parameters are optional. It is possible to provide an ENTREZ query string
---blastHTTP :: Maybe String -> Maybe String -> Maybe SeqData -> Maybe String -> IO (Either String BlastResult)
+-- The querySequence has to be provided, all other parameters are optional and can be set to Nothing
+-- optionalArguments is attached to the query as is .e.g: "&ALIGNMENTS=250"
 blastHTTP :: BlastHTTPQuery -> IO (Either String BlastResult)
-blastHTTP (BlastHTTPQuery program database querySequence entrezQuery) = do
+blastHTTP (BlastHTTPQuery program database querySequence optionalArguments) = do
   let counter = 1
   let defaultProgram = "blastn"
   let defaultDatabase = "refseq_genomic"                  
   let selectedProgram = fromMaybe defaultProgram program
   let selectedDatabase = fromMaybe defaultDatabase database  
-  performQuery selectedProgram selectedDatabase querySequence entrezQuery counter
+  performQuery selectedProgram selectedDatabase querySequence entrezQuery optionalArguments