diff -r 08b64ae5a564 -r 6e1027a05d73 lemon/bits/item_reader.h
--- a/lemon/bits/item_reader.h	Thu Apr 19 15:12:59 2007 +0000
+++ b/lemon/bits/item_reader.h	Thu Apr 19 15:14:34 2007 +0000
@@ -30,6 +30,9 @@
 #include <deque>
 #include <list>
 #include <set>
+#include <map>
+
+#include <lemon/error.h>
 
 namespace lemon {
   
@@ -172,9 +175,10 @@
       char c;
       value.clear();
       is >> std::ws;
-      if (!is.get(c) || c != '\"') 
+      if (!is.get(c) || (c != '\"' && c != '\'')) 
 	throw DataFormatError("Quoted format error");
-      while (is.get(c) && c != '\"') {
+      char quote = c;
+      while (is.get(c) && c != quote) {
 	if (escaped && c == '\\') {
 	  value += readEscape(is);
 	} else {