diff --git a/bibtexbrowser.php b/bibtexbrowser.php
index c66a4fe..47bef2b 100755
--- a/bibtexbrowser.php
+++ b/bibtexbrowser.php
@@ -963,8 +963,20 @@ class BibEntry {
 
   /** Tries to build a good URL for this entry */
   function getURL() {
-    if ($this->hasField('url')) return $this->getField('url');
-    else return "http://".$_SERVER['HTTP_HOST'].dirname($_SERVER['SCRIPT_NAME']).'/'.BIBTEXBROWSER_URL.'?'.createQueryString(array('key'=>$this->getKey()));
+    if (defined('BIBTEXBROWSER_URL_BUILDER')) {
+      $f = BIBTEXBROWSER_URL_BUILDER;
+      return $f($this);
+    }
+    return BIBTEXBROWSER_URL.'?'.createQueryString(array('key'=>$this->getKey()));
+  }
+
+  /** Tries to build a good absolute URL for this entry */
+  function getAbsoluteURL() {
+    if (defined('BIBTEXBROWSER_URL_BUILDER')) {
+      $f = BIBTEXBROWSER_URL_BUILDER;
+      return $f($this);
+    }
+    return "http://".$_SERVER['HTTP_HOST'].dirname($_SERVER['SCRIPT_NAME']).'/'.$this->getURL();
   }
 
   /** returns a "[pdf]" link if relevant */
@@ -1229,7 +1241,7 @@ class BibEntry {
         echo '<td class="bibitem">';
         echo bib2html($this);
 
-        $href = 'href="'.BIBTEXBROWSER_URL.'?'.createQueryString(array(Q_KEY => $this->getKey())).'"';
+        $href = 'href="'.$this->getURL().'"';
 
         // we add biburl and title to be able to retrieve this important information
         // using Xpath expressions on the XHTML source
@@ -2713,7 +2725,7 @@ class RSSDisplay {
          ?>
          <item>
          <title><?php echo $this->text2rss($bibentry->getTitle());?></title>
-         <link><?php echo htmlentities($bibentry->getURL());?></link>
+         <link><?php echo $bibentry->getAbsoluteURL();?></link>
          <description>
           <?php
             // we are in XML, so we cannot have HTML entitites
diff --git a/test/output/4c4c65636d50fa083859c4101a3f88dc.html b/test/output/4c4c65636d50fa083859c4101a3f88dc.html
index 0b9e952..e03b4d9 100755
--- a/test/output/4c4c65636d50fa083859c4101a3f88dc.html
+++ b/test/output/4c4c65636d50fa083859c4101a3f88dc.html
@@ -341,7 +341,7 @@
          </item>
                   <item>
          <title>Computing Model Complexity</title>
-         <link>http://www.ilogix.com/whitepapers/whitepapers.cfm</link>
+         <link>http://localhost./bibtexbrowser.php?key=Douglass2004&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Bruce Powel Douglass,  "Computing Model Complexity", 2004.
 
@@ -350,7 +350,7 @@
          </item>
                   <item>
          <title>Dynamic Metrics for Java</title>
-         <link>http://www.sable.mcgill.ca/publications/papers/2003-5/sable-paper-2003-5.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=dufour03&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Bruno Dufour, Karel Driesen, Laurie Hendren, Clark Verbrugge,  "Dynamic Metrics for Java", In Proceedings of the ACM SIGPLAN 2003 Conference on Object-Oriented Programming, Systems, Languages, and Applications (OOPSLA'03), ACM Press, pp. 149-168, 2003.
 
@@ -449,7 +449,7 @@
          </item>
                   <item>
          <title>Defining and Validating Metrics for UML Statechart Diagrams</title>
-         <link>http://alarcos.inf-cr.uclm.es/qaoose2002/docs/QAOOSE-Gen-Mir-Pia.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Genero2002&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           M. Genero, D. Miranda, M. Piattini,  "Defining and Validating Metrics for UML Statechart Diagrams", In Proceedings of QAOOSE'2002, 2002.
 
@@ -539,7 +539,7 @@
          </item>
                   <item>
          <title>Characterizing the Evolution of Class Hierarchies</title>
-         <link>http://www.iam.unibe.ch/~scg/Archive/Papers/Girb05aHierarchiesEvolution.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=girba05a&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Tudor Gîrba, Michele Lanza, Stéphane Ducasse,  "Characterizing the Evolution of Class Hierarchies", In Proceedings of the 9th European Conference on Software Maintenance and Reengineering (CSMR'05), IEEE Computer Society, pp. 2-11, 2005.
 
@@ -665,7 +665,7 @@
          </item>
                   <item>
          <title>Software Metrics as Class Graph Properties</title>
-         <link>http://www.cs.utwente.nl/~kastenbe/public/Master_Thesis.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Kastenberg2004&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Harmen Kastenberg,  "Software Metrics as Class Graph Properties", Master's thesis, University of Twente, 2004.
 
@@ -683,7 +683,7 @@
          </item>
                   <item>
          <title>Developing Software Metrics Applicable to UML Models</title>
-         <link>http://alarcos.inf-cr.uclm.es/qaoose2002/docs/QAOOSE-Kim-Bol.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Kim2002&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Hyoseob Kim, Cornelia Boldyreff,  "Developing Software Metrics Applicable to UML Models", In Proceedings of QAOOSE'2002, 2002.
 
@@ -737,7 +737,7 @@
          </item>
                   <item>
          <title>Beyond Language Independent Object-Oriented Metrics: Model Independent Metrics</title>
-         <link>http://www.iam.unibe.ch/~scg/Archive/Papers/Lanz02bModelIndependentMetrics.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Lanza2002&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Michele Lanza, Stéphane Ducasse,  "Beyond Language Independent Object-Oriented Metrics: Model Independent Metrics", In Proceedings of the 6th International Workshop on Quantitative Approaches in Object-Oriented Software Engineering, pp. 77-84, 2002.
 
@@ -755,7 +755,7 @@
          </item>
                   <item>
          <title>Automated Measurement of UML Models: an open toolset approach</title>
-         <link>http://www.jot.fm/issues/issue_2005_05/article2</link>
+         <link>http://localhost./bibtexbrowser.php?key=Lavazza2005&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Luigi Lavazza, Alberto Agostini,  "Automated Measurement of UML Models: an open toolset approach", In Journal of Object Technology, vol. 4, no. 4, pp. 115-134, 2005.
 
@@ -800,7 +800,7 @@
          </item>
                   <item>
          <title>Measuring the Requirements Management Key Process Area</title>
-         <link>http://www.cs.umu.se/~jubo/Projects/QMSE/ESCOM2001.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Loconsole2001&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Annabella Loconsole,  "Measuring the Requirements Management Key Process Area", In Proceedings of the 12th European Software Control and Metrics Conference (ESCOM'2001), 2001.
 
@@ -935,7 +935,7 @@
          </item>
                   <item>
          <title>Metrology - in short</title>
-         <link>http://www.euromet.org/docs/pubs/docs/Metrology_in_short_2nd_edition_may_2004.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Metrotrade2003&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Metrotrade Project, Regmet Project,  "Metrology - in short", European Association of National Metrology Institutes, 2003.
 
@@ -980,7 +980,7 @@
          </item>
                   <item>
          <title>La mesure des modèles par les modèles : une approche générative</title>
-         <link>http://www.monperrus.net/martin/la-mesure-des-modeles-par-les-modeles-une-approche-generative.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08phd&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus,  "La mesure des modèles par les modèles : une approche générative", PhD thesis, Université de Rennes, 2008. (Advisor: JM. Jézéquel; Examiners: H. Sahraoui, S. Ducasse)
 
@@ -989,7 +989,7 @@
          </item>
                   <item>
          <title>Counts Count</title>
-         <link>http://www.monperrus.net/martin/Counts_Count.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus07&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Joël Champeau, Brigitte Hoeltzener,  "Counts Count", In Proceedings of the 2nd Workshop on Model Size Metrics (MSM'07) co-located with MODELS'2007, 2007.
 
@@ -998,7 +998,7 @@
          </item>
                   <item>
          <title>Measuring Models</title>
-         <link>http://www.monperrus.net/martin/Measuring-models-in-Model-Driven-Software-Development-Integrating-Quality-Assurance.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08b&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "Measuring Models", Chapter in Model-Driven Software Development: Integrating Quality Assurance, IDEA Group, 2008.
 
@@ -1007,7 +1007,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>Model-driven Engineering Metrics for Real Time Systems</title>
-         <link>http://www.monperrus.net/martin/Model-driven_Engineering_Metrics_for_Real_Time_Systems.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08a&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "Model-driven Engineering Metrics for Real Time Systems", In Proceedings of the 4th European Congress on Embedded Real Time Software (ERTS'2008), 2008.
 
@@ -1016,7 +1016,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>A Model-driven Measurement Approach</title>
-         <link>http://www.monperrus.net/martin/A-Model-Driven-Measurement-Approach.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08d&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "A Model-driven Measurement Approach", In Proceedings of the ACM/IEEE 11th International Conference on Model Driven Engineering Languages and Systems (MODELS'2008), 2008. (acceptance rate: 58/274)
 
@@ -1115,7 +1115,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>Measuring OCL expressions: a "tracing"-based approach</title>
-         <link>http://www-ctp.di.fct.unl.pt/QUASAR/QAOOSE2003/papers/OCLM-QAOOSE03.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=Reynoso2003&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Luis Reynoso, Marcela Genero, Mario Piattini,  "Measuring OCL expressions: a "tracing"-based approach", In Proceedings of QAOOSE'2003, 2003.
 
@@ -1124,7 +1124,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>Embedding Metrics into Information Systems Development Methods: An Application of Method Engineering Technique</title>
-         <link>http://link.springer.de/link/service/series/0558/bibs/2681/26810374.htm</link>
+         <link>http://localhost./bibtexbrowser.php?key=Saeki2003&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Motoshi Saeki,  "Embedding Metrics into Information Systems Development Methods: An Application of Method Engineering Technique", In CAiSE, pp. 374-389, 2003.
 
@@ -1169,7 +1169,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>The Software Design Metrics tool for the UML (http://www.sdmetrics.com/)</title>
-         <link>http://www.sdmetrics.com/</link>
+         <link>http://localhost./bibtexbrowser.php?key=sdmetrics&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           SDMetrics,  "The Software Design Metrics tool for the UML (http://www.sdmetrics.com/)", 2006.
 
diff --git a/test/output/7927fcd8654efc9521cae97590ac1e7b.html b/test/output/7927fcd8654efc9521cae97590ac1e7b.html
index f9f737b..e66895a 100755
--- a/test/output/7927fcd8654efc9521cae97590ac1e7b.html
+++ b/test/output/7927fcd8654efc9521cae97590ac1e7b.html
@@ -8,7 +8,7 @@
 
          <item>
          <title>La mesure des modèles par les modèles : une approche générative</title>
-         <link>http://www.monperrus.net/martin/la-mesure-des-modeles-par-les-modeles-une-approche-generative.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08phd&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus,  "La mesure des modèles par les modèles : une approche générative", PhD thesis, Université de Rennes, 2008. (Advisor: JM. Jézéquel; Examiners: H. Sahraoui, S. Ducasse)
 
@@ -17,7 +17,7 @@
          </item>
                   <item>
          <title>A Model-driven Measurement Approach</title>
-         <link>http://www.monperrus.net/martin/A-Model-Driven-Measurement-Approach.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08d&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "A Model-driven Measurement Approach", In Proceedings of the ACM/IEEE 11th International Conference on Model Driven Engineering Languages and Systems (MODELS'2008), 2008. (acceptance rate: 58/274)
 
@@ -26,7 +26,7 @@
          </item>
                   <item>
          <title>Measuring Models</title>
-         <link>http://www.monperrus.net/martin/Measuring-models-in-Model-Driven-Software-Development-Integrating-Quality-Assurance.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08b&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "Measuring Models", Chapter in Model-Driven Software Development: Integrating Quality Assurance, IDEA Group, 2008.
 
@@ -35,7 +35,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>Model-driven Engineering Metrics for Real Time Systems</title>
-         <link>http://www.monperrus.net/martin/Model-driven_Engineering_Metrics_for_Real_Time_Systems.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus08a&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Jean-Marc Jézéquel, Joël Champeau, Brigitte Hoeltzener,  "Model-driven Engineering Metrics for Real Time Systems", In Proceedings of the 4th European Congress on Embedded Real Time Software (ERTS'2008), 2008.
 
@@ -44,7 +44,7 @@ Model-Driven Engineering (MDE) is an approach to software development that uses
          </item>
                   <item>
          <title>Counts Count</title>
-         <link>http://www.monperrus.net/martin/Counts_Count.pdf</link>
+         <link>http://localhost./bibtexbrowser.php?key=monperrus07&amp;amp;bib=%252Fvar%252Fwww%252Fbibtexbrowser%252Ftest%252Finput%252Fmetrics.bib</link>
          <description>
           Martin Monperrus, Joël Champeau, Brigitte Hoeltzener,  "Counts Count", In Proceedings of the 2nd Workshop on Model Size Metrics (MSM'07) co-located with MODELS'2007, 2007.