--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Core/DicomFormat/DicomTag.cpp	Thu Jul 19 14:32:22 2012 +0200
@@ -0,0 +1,62 @@
+/**
+ * Palantir - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
+ * Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "DicomTag.h"
+
+#include "../PalantirException.h"
+
+#include <iostream>
+#include <iomanip>
+
+namespace Palantir
+{
+  bool DicomTag::operator< (const DicomTag& other) const
+  {
+    if (group_ < other.group_)
+      return true;
+
+    if (group_ > other.group_)
+      return false;
+
+    return element_ < other.element_;
+  }
+
+
+  std::ostream& operator<< (std::ostream& o, const DicomTag& tag)
+  {
+    using namespace std;
+    ios_base::fmtflags state = o.flags();
+    o.flags(ios::right | ios::hex);
+    o << "(" << setfill('0') << setw(4) << tag.GetGroup()
+      << "," << setw(4) << tag.GetElement() << ")";
+    o.flags(state);
+    return o;
+  }
+
+
+  const DicomTag DicomTag::ACCESSION_NUMBER = DicomTag(0x0008, 0x0050);
+  const DicomTag DicomTag::IMAGE_INDEX = DicomTag(0x0054, 0x1330);
+  const DicomTag DicomTag::INSTANCE_UID = DicomTag(0x0008, 0x0018);
+  const DicomTag DicomTag::NUMBER_OF_SLICES = DicomTag(0x0054, 0x0081);
+  const DicomTag DicomTag::PATIENT_ID = DicomTag(0x0010, 0x0020);
+  const DicomTag DicomTag::SERIES_UID = DicomTag(0x0020, 0x000e);
+  const DicomTag DicomTag::STUDY_UID = DicomTag(0x0020, 0x000d);
+  const DicomTag DicomTag::PIXEL_DATA = DicomTag(0x7fe0, 0x0010);
+}