Add Beta annotation for DocumentFrequency record.

container-search/abi-spec.json

@@ -500,7 +500,7 @@
       "public final int hashCode()",
       "public final boolean equals(java.lang.Object)",
       "public long frequency()",
-      "public long corpusSize()"
+      "public long count()"
     ],
     "fields" : [ ]
   },

container-search/src/main/java/com/yahoo/prelude/query/DocumentFrequency.java

@@ -1,10 +1,16 @@
 // Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.prelude.query;
 
-/*
- * The expected number of documents matching the item given a corpus of
+import com.yahoo.api.annotations.Beta;
+
+/**
+ * The expected number of documents matching an item given a corpus of
  * multiple documents. This is the raw data used to calculate variants
  * of idf, used as significance.
+ *
+ * @param frequency The number of documents in which an item occurs
+ * @param count     The total number of documents in the corpus
  */
-public record DocumentFrequency(long frequency, long corpusSize) {
+@Beta
+public record DocumentFrequency(long frequency, long count) {
 }

container-search/src/main/java/com/yahoo/prelude/query/TaggableItem.java

@@ -1,5 +1,6 @@
 // Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.prelude.query;
+import com.yahoo.api.annotations.Beta;
 
 import java.util.Optional;
 
@@ -46,6 +47,9 @@ public interface TaggableItem {
     void setExplicitSignificance(boolean significance);
     double getSignificance();
 
+    @Beta
     void setDocumentFrequency(DocumentFrequency documentFrequency);
+
+    @Beta
     Optional<DocumentFrequency> getDocumentFrequency();
 }