--- a/flys-artifacts/ChangeLog	Wed Oct 12 10:21:59 2011 +0000
+++ b/flys-artifacts/ChangeLog	Wed Oct 12 10:59:12 2011 +0000
@@ -1,3 +1,11 @@
+2011-10-12	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
+
+	Cosmetics, docs.
+
+	* src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java:
+	  Cosmetics: Space after full stop in commments, slightly improved
+	  documentation, added one debug message.
+
 2011-10-12	Felix Wolfsteller	<felix.wolfsteller@intevation.de>
 
 	Fix remainder of flys/issue304 (Erweiterte Funktionen W-Differenzen) .

--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java	Wed Oct 12 10:21:59 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/FLYSArtifact.java	Wed Oct 12 10:59:12 2011 +0000
@@ -59,17 +59,17 @@
  */
 public abstract class FLYSArtifact extends DefaultArtifact {
 
-    /** The logger that is used in this artifact.*/
+    /** The logger that is used in this artifact. */
     private static Logger logger = Logger.getLogger(FLYSArtifact.class);
 
 
     public static final String COMPUTING_CACHE = "computed.values";
 
-    /** The XPath that points to the input data elements of the FEED document.*/
+    /** The XPath that points to the input data elements of the FEED document. */
     public static final String XPATH_FEED_INPUT =
         "/art:action/art:data/art:input";
 
-    /** The XPath that points to the name of the target state of ADVANCE.*/
+    /** The XPath that points to the name of the target state of ADVANCE. */
     public static final String XPATH_ADVANCE_TARGET =
         "/art:action/art:target/@art:name";
 
@@ -79,29 +79,32 @@
     public static final String XPATH_FILTER =
         "/art:action/art:filter/art:out";
 
-    /** The constant string that shows that an operation was successful.*/
+    /** The constant string that shows that an operation was successful. */
     public static final String OPERATION_SUCCESSFUL = "SUCCESS";
 
-    /** The constant string that shows that an operation failed.*/
+    /** The constant string that shows that an operation failed. */
     public static final String OPERATION_FAILED = "FAILURE";
 
 
     /** The identifier of the current state. */
     protected String currentStateId;
 
-    /** The identifiers of previous states on a stack.*/
+    /** The identifiers of previous states on a stack. */
     protected List<String> previousStateIds;
 
-    /** The name of the artifact.*/
+    /** The name of the artifact. */
     protected String name;
 
-    /** The data that have been inserted into this artifact.*/
+    /** The data that have been inserted into this artifact. */
     protected Map<String, StateData> data;
 
-    /** The list of facets supported by this artifact.*/
+    /** The list of facets supported by this artifact. */
     protected Map<String, List<Facet>> facets;
 
-    /** out -&gt; facets */
+    /**
+     * Used to generates "view" on the facets (hides facets not matching the
+     * filter in output of collection);  out -&gt; facets.
+     */
     protected Map<String, List<Facet>> filterFacets;
 
 
@@ -236,6 +239,11 @@
         // Do not clone filter facets!
     }
 
+
+    /**
+     * Builds filter facets from document.
+     * @see filterFacets
+     */
     protected Map<String, List<Facet>> buildFilterFacets(Document document) {
 
         NodeList nodes = (NodeList)XMLUtils.xpath(
@@ -663,6 +671,7 @@
     protected List<Output> filterOutputs(List<Output> outs) {
 
         if (filterFacets == null || filterFacets.isEmpty()) {
+            logger.debug("No filter for Outputs.");
             return outs;
         }
 
@@ -825,6 +834,10 @@
         return compute(context, hash, current, type, generateFacets);
     }
 
+
+    /**
+     * Like compute, but identify State by it id (string).
+     */
     public Object compute(
         CallContext context,
         String      hash,