diff --git a/source/net/yacy/cora/services/federated/solr/SolrDoc.java b/source/net/yacy/cora/services/federated/solr/SolrDoc.java
new file mode 100644
index 000000000..074360dbe
--- /dev/null
+++ b/source/net/yacy/cora/services/federated/solr/SolrDoc.java
@@ -0,0 +1,75 @@
+/**
+ *  SolrDoc
+ *  Copyright 2011 by Michael Peter Christen
+ *  First released 09.05.2012 at http://yacy.net
+ *
+ *  $LastChangedDate: 2011-04-14 22:05:04 +0200 (Do, 14 Apr 2011) $
+ *  $LastChangedRevision: 7654 $
+ *  $LastChangedBy: orbiter $
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program in the file lgpl21.txt
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.yacy.cora.services.federated.solr;
+
+import java.util.Date;
+import java.util.List;
+
+import org.apache.solr.common.SolrInputDocument;
+
+/**
+ * helper class to produce SolrInputDocuments
+ */
+public class SolrDoc extends SolrInputDocument {
+
+    private static final long serialVersionUID=1L;
+
+    public SolrDoc() {
+        super();
+    }
+
+    public final void addSolr(final SolrField key, final String value) {
+       this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final Date value) {
+        this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final int value) {
+        this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final String[] value) {
+        this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final List<String> value) {
+        this.setField(key.name(), value.toArray(new String[value.size()]));
+    }
+
+    public final void addSolr(final SolrField key, final float value) {
+        this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final boolean value) {
+        this.setField(key.name(), value);
+    }
+
+    public final void addSolr(final SolrField key, final String value, final float boost) {
+        this.setField(key.name(), value, boost);
+    }
+
+}
diff --git a/source/net/yacy/cora/services/federated/solr/SolrScheme.java b/source/net/yacy/cora/services/federated/solr/SolrScheme.java
new file mode 100644
index 000000000..f58a910d2
--- /dev/null
+++ b/source/net/yacy/cora/services/federated/solr/SolrScheme.java
@@ -0,0 +1,32 @@
+/**
+ *  SolrScheme
+ *  Copyright 2011 by Michael Peter Christen
+ *  First released 09.05.2012 at http://yacy.net
+ *
+ *  $LastChangedDate: 2011-04-14 22:05:04 +0200 (Do, 14 Apr 2011) $
+ *  $LastChangedRevision: 7654 $
+ *  $LastChangedBy: orbiter $
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program in the file lgpl21.txt
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.yacy.cora.services.federated.solr;
+
+
+public interface SolrScheme {
+
+    public SolrDoc toSolr();
+
+}