added citation rank to ranking profile

htroot/Ranking_p.java

@@ -77,6 +77,7 @@ public class Ranking_p {
         rankingParameters.put(RankingProfile.URLCOMPINTOPLIST, "URL Component Appears In Toplist;a higher ranking level prefers documents with words in the url path that match words in the toplist. The toplist is generated dynamically from the search results using a statistic of the most used words. The toplist is a top-10 list of the most used words in URLs and document titles.");
         rankingParameters.put(RankingProfile.DESCRCOMPINTOPLIST, "Description Comp. Appears In Toplist;a higher ranking level prefers documents with words in the document description that match words in the toplist. The toplist is generated dynamically from the search results using a statistic of the most used words. The toplist is a top-10 list of the most used words in URLs and document titles.");
         rankingParameters.put(RankingProfile.PREFER, "Application Of Prefer Pattern;a higher ranking level prefers documents where the url matches the prefer pattern given in a search request.");
+        rankingParameters.put(RankingProfile.CITATION, "Citation Rank;the more incoming links and the less outgoing links the better the ranking.");
 	}
 
     private static serverObjects defaultValues() {

source/net/yacy/search/query/SnippetProcess.java

@@ -308,7 +308,7 @@ public class SnippetProcess {
 
         // apply citation count
         //System.out.println("POSTRANKING CITATION: references = " + rentry.referencesCount() + ", inbound = " + rentry.llocal() + ", outbound = " + rentry.lother());
-        r += (128 * rentry.referencesCount() / (1 + 2 * rentry.llocal() + rentry.lother())) << 8;
+        r += (128 * rentry.referencesCount() / (1 + 2 * rentry.llocal() + rentry.lother())) << this.query.ranking.coeff_citation;
         
         // prefer hit with 'prefer' pattern
         if (this.query.prefer.matcher(rentry.url().toNormalform(true, true)).matches()) {

source/net/yacy/search/ranking/RankingProfile.java

@@ -69,7 +69,8 @@ public class RankingProfile {
     // post-sort predicates
     public static final String URLCOMPINTOPLIST   = "urlcompintoplist";
     public static final String DESCRCOMPINTOPLIST = "descrcompintoplist";
-    public static final String PREFER = "prefer";
+    public static final String PREFER             = "prefer";
+    public static final String CITATION           = "citation";
 
     // coefficient max/min values
     public static final int COEFF_MIN =  0;
@@ -82,16 +83,16 @@ public class RankingProfile {
         coeff_appurl, coeff_app_dc_title, coeff_app_dc_creator, coeff_app_dc_subject, coeff_app_dc_description, coeff_appemph,
         coeff_catindexof, coeff_cathasimage, coeff_cathasaudio, coeff_cathasvideo, coeff_cathasapp,
         coeff_urlcompintoplist, coeff_descrcompintoplist, coeff_prefer,
-        coeff_termfrequency, coeff_language;
+        coeff_termfrequency, coeff_language, coeff_citation;
 
     public RankingProfile(final ContentDomain mediatype) {
         // set default-values
         this.coeff_appemph            = 5;
         this.coeff_appurl             = 11;
         this.coeff_app_dc_creator     = 1;
-        this.coeff_app_dc_description = 4;
+        this.coeff_app_dc_description = 8;
         this.coeff_app_dc_subject     = 2;
-        this.coeff_app_dc_title       = 8;
+        this.coeff_app_dc_title       = 12;
         this.coeff_authority          = 5;
         this.coeff_cathasapp          = (mediatype == ContentDomain.APP) ? 15 : 0;
         this.coeff_cathasaudio        = (mediatype == ContentDomain.AUDIO) ? 15 : 0;
@@ -116,9 +117,10 @@ public class RankingProfile {
         this.coeff_wordsintitle       = 2;
         this.coeff_ybr                = 8;
 
-        this.coeff_urlcompintoplist   = 15;
-        this.coeff_descrcompintoplist = 15;
-        this.coeff_prefer             = 15;
+        this.coeff_urlcompintoplist   = 2;
+        this.coeff_descrcompintoplist = 2;
+        this.coeff_prefer             = 0;
+        this.coeff_citation           = 15;
     }
 
     public RankingProfile(final String prefix, String profile) {
@@ -181,6 +183,7 @@ public class RankingProfile {
             this.coeff_descrcompintoplist = parseMap(coeff, DESCRCOMPINTOPLIST, this.coeff_descrcompintoplist);
             this.coeff_prefer             = parseMap(coeff, PREFER, this.coeff_prefer);
             this.coeff_language           = parseMap(coeff, LANGUAGE, this.coeff_language);
+            this.coeff_citation           = parseMap(coeff, CITATION, this.coeff_citation);
         }
     }
 
@@ -275,10 +278,12 @@ public class RankingProfile {
             ext.put(URLCOMPINTOPLIST, Integer.toString(this.coeff_urlcompintoplist));
             ext.put(DESCRCOMPINTOPLIST, Integer.toString(this.coeff_descrcompintoplist));
             ext.put(PREFER, Integer.toString(this.coeff_prefer));
+            ext.put(CITATION, Integer.toString(this.coeff_citation));
         } else {
             ext.put(prefix + URLCOMPINTOPLIST, Integer.toString(this.coeff_urlcompintoplist));
             ext.put(prefix + DESCRCOMPINTOPLIST, Integer.toString(this.coeff_descrcompintoplist));
             ext.put(prefix + PREFER, Integer.toString(this.coeff_prefer));
+            ext.put(prefix + CITATION, Integer.toString(this.coeff_citation));
         }
         return ext;
     }