diff --git a/indexer/src/main/java/au/org/aodn/esindexer/service/StacCollectionMapperService.java b/indexer/src/main/java/au/org/aodn/esindexer/service/StacCollectionMapperService.java
index b3bae780..779abc44 100644
--- a/indexer/src/main/java/au/org/aodn/esindexer/service/StacCollectionMapperService.java
+++ b/indexer/src/main/java/au/org/aodn/esindexer/service/StacCollectionMapperService.java
@@ -635,14 +635,14 @@ protected List<ConceptModel> mapThemesConcepts(MDKeywordsPropertyType descriptiv
     }
 
     protected String mapThemesTitle(MDKeywordsPropertyType descriptiveKeyword, String uuid) {
-        return safeGet(() -> descriptiveKeyword.getMDKeywords().getThesaurusName().getAbstractCitation())
+        String title = safeGet(() -> descriptiveKeyword.getMDKeywords().getThesaurusName().getAbstractCitation())
                 .map(citation -> {
                     if(citation.getValue() instanceof CICitationType2 thesaurusNameType2) {
                         CharacterStringPropertyType titleString = thesaurusNameType2.getTitle();
                         if (titleString != null
                                 && titleString.getCharacterString() != null
                                 && titleString.getCharacterString().getValue() instanceof AnchorType value) {
-                            return (value.getValue() != null ? value.getValue() : "");
+                            return value.getValue();
                         }
                         else if (titleString != null
                                 && titleString.getCharacterString() != null
@@ -650,24 +650,28 @@ else if (titleString != null
                             return value;
                         }
                     }
-                    return "";
+                    return null;
                 })
-                .orElseGet(() -> {
-                    // If no thesaurusName, try to use type as title
-                    // make sure it is really not a thesaurusName
-                    if (safeGet(() -> descriptiveKeyword.getMDKeywords().getThesaurusName()).isEmpty()) {
-                        var type = safeGet(() -> descriptiveKeyword.getMDKeywords().getType().getMDKeywordTypeCode().getCodeListValue());
-                        if (type.isPresent()) {
-                            if (type.get().isEmpty()) {
-                                return "Keywords";
-                            }
-                            return String.format("Keywords (%s)", capitalizeFirstLetter(type.get()));
-                        }
+                .orElse(null);
 
-                    }
-                    logger.debug("Unable to find themes' title for metadata record: {}", uuid);
-                    return "";
-                });
+        // If no thesaurusName, try to use type as title
+        // make sure it is really not a thesaurusName
+        if (title == null || title.trim().isEmpty()) {
+            if (safeGet(() -> descriptiveKeyword.getMDKeywords().getThesaurusName()).isEmpty()) {
+                var type = safeGet(() -> descriptiveKeyword.getMDKeywords().getType().getMDKeywordTypeCode().getCodeListValue());
+                if (type.isPresent() && !type.get().isEmpty()) {
+                    title = String.format("Keywords (%s)", capitalizeFirstLetter(type.get()));
+                }
+            }
+        }
+
+        // Use title if valid, otherwise use default "Descriptive Keyword"
+        if (title == null || title.trim().isEmpty()) {
+            logger.debug("Using default 'Descriptive Keyword' title for metadata record: {}", uuid);
+            return "Descriptive Keyword";
+        }
+
+        return title;
     }
 
     protected String mapThemesDescription(MDKeywordsPropertyType descriptiveKeyword, String uuid) {
diff --git a/indexer/src/test/resources/canned/aienhancement/sample1_stac_ai_enhanced.json b/indexer/src/test/resources/canned/aienhancement/sample1_stac_ai_enhanced.json
index 72a6d0f8..49a6cf40 100644
--- a/indexer/src/test/resources/canned/aienhancement/sample1_stac_ai_enhanced.json
+++ b/indexer/src/test/resources/canned/aienhancement/sample1_stac_ai_enhanced.json
@@ -617,82 +617,82 @@
       "id" : "Current direction in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCDAZZ01",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Current speed in the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/383",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Eastward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCEWZZ01",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Northward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCNSZZ01",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Upward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LRZAZZZZ",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Practical salinity of the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Temperature of the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/TEMPPR01",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/565",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Pressure (measured variable) in the water body exerted by overlying sea water only",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/566",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Gravity",
       "url" : "http://vocab.ndg.nerc.ac.uk/term/P011/667/GRAVFLDX",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Sub-bottom structure",
       "url" : "N/A",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Abundance of biota",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/488",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Biovolume",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/22",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Sea-floor depth below surface of the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/574",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Sea-floor surface hardness",
       "url" : "N/A",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Density of the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/401",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   }, {
@@ -700,7 +700,7 @@
       "id" : "research vessel",
       "url" : "http://vocab.nerc.ac.uk/collection/L06/current/31",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   }, {
@@ -708,47 +708,47 @@
       "id" : "current profilers",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/115",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "lowered current profilers",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/116/",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "CTD",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/130",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "gravimeters",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/158/",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "2000 Hz top-bandwidth sub-bottom penetrator and mud profiler systems",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/367/",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "Fish-finder echosounders",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/FFES",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "multi-beam echosounders",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/157",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "thermosalinographs",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/133",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     }, {
       "id" : "bathythermographs",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/132",
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   },  {
diff --git a/indexer/src/test/resources/canned/aienhancement/sample2_stac_ai_enhanced.json b/indexer/src/test/resources/canned/aienhancement/sample2_stac_ai_enhanced.json
index 4acc962a..48976ac5 100644
--- a/indexer/src/test/resources/canned/aienhancement/sample2_stac_ai_enhanced.json
+++ b/indexer/src/test/resources/canned/aienhancement/sample2_stac_ai_enhanced.json
@@ -4408,91 +4408,91 @@
           "id": "Practical salinity of the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Temperature of the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/TEMPPR01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/565",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Pressure (measured variable) in the water body exerted by overlying sea water only",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/566",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Current direction in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCDAZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Current speed in the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/383",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Eastward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCEWZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Northward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCNSZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Upward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LRZAZZZZ",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sea-floor depth below surface of the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/574",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sea-floor surface hardness",
           "url": "N/A",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Density of the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/401",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sub-bottom structure",
           "url": "N/A",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Abundance of biota",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/488",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Biovolume",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/22",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
@@ -4503,7 +4503,7 @@
           "id": "research vessel",
           "url": "http://vocab.nerc.ac.uk/collection/L06/current/31",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
@@ -4514,49 +4514,49 @@
           "id": "CTD",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/130",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "lowered current profilers",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/116/",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "current profilers",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/115",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "bathythermographs",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/132",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "multi-beam echosounders",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/157",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "2000 Hz top-bandwidth sub-bottom penetrator and mud profiler systems",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/367/",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "thermosalinographs",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/133",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Fish-finder echosounders",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/FFES",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
diff --git a/indexer/src/test/resources/canned/keywords_null_stac.json b/indexer/src/test/resources/canned/keywords_null_stac.json
index f854d7a7..e7e498a1 100644
--- a/indexer/src/test/resources/canned/keywords_null_stac.json
+++ b/indexer/src/test/resources/canned/keywords_null_stac.json
@@ -133,7 +133,7 @@
       "id" : "National Environmental Science Program",
       "url" : null,
       "description" : "",
-      "title" : "Keywords"
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   }, {
@@ -141,7 +141,7 @@
       "id" : "Marine Biodiversity Hub",
       "url" : null,
       "description" : "",
-      "title" : "Keywords"
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   }, {
@@ -149,7 +149,7 @@
       "id" : "Published_External",
       "url" : null,
       "description" : "",
-      "title" : ""
+      "title" : "Descriptive Keyword"
     } ],
     "scheme" : ""
   }, {
diff --git a/indexer/src/test/resources/canned/sample12_stac.json b/indexer/src/test/resources/canned/sample12_stac.json
index 1d63a49a..d2ec7ec1 100644
--- a/indexer/src/test/resources/canned/sample12_stac.json
+++ b/indexer/src/test/resources/canned/sample12_stac.json
@@ -255,12 +255,12 @@
     "concepts" : [ {
       "id" : "MARINE",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "METEOROLOGY",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
diff --git a/indexer/src/test/resources/canned/sample23_stac.json b/indexer/src/test/resources/canned/sample23_stac.json
index 625f4429..031e4cd1 100644
--- a/indexer/src/test/resources/canned/sample23_stac.json
+++ b/indexer/src/test/resources/canned/sample23_stac.json
@@ -106,67 +106,67 @@
     "concepts" : [ {
       "id" : "singlebeam",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "australia",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "hydrography",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "coast",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "levels",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "marine",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "DOT",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "bathymetry",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "WA",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "depth",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "survey",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "sea",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "ocean",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
@@ -174,7 +174,7 @@
     "concepts" : [ {
       "id" : "Downloadable Data",
       "url" : null,
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
diff --git a/indexer/src/test/resources/canned/sample6_stac.json b/indexer/src/test/resources/canned/sample6_stac.json
index 2000b6a1..ee6c3677 100644
--- a/indexer/src/test/resources/canned/sample6_stac.json
+++ b/indexer/src/test/resources/canned/sample6_stac.json
@@ -4403,91 +4403,91 @@
           "id": "Practical salinity of the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Temperature of the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/TEMPPR01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/565",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Pressure (measured variable) in the water body exerted by overlying sea water only",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/566",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Current direction in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCDAZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Current speed in the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/383",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Eastward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCEWZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Northward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LCNSZZ01",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Upward current velocity in the water body",
           "url": "http://vocab.nerc.ac.uk/collection/P01/current/LRZAZZZZ",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sea-floor depth below surface of the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/574",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sea-floor surface hardness",
           "url": "N/A",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Density of the water body",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/401",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Sub-bottom structure",
           "url": "N/A",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Abundance of biota",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/488",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Biovolume",
           "url": "http://vocab.aodn.org.au/def/discovery_parameter/entity/22",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
@@ -4498,7 +4498,7 @@
           "id": "research vessel",
           "url": "http://vocab.nerc.ac.uk/collection/L06/current/31",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
@@ -4509,49 +4509,49 @@
           "id": "CTD",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/130",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "lowered current profilers",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/116/",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "current profilers",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/115",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "bathythermographs",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/132",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "multi-beam echosounders",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/157",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "2000 Hz top-bandwidth sub-bottom penetrator and mud profiler systems",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/367/",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "thermosalinographs",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/133",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         },
         {
           "id": "Fish-finder echosounders",
           "url": "http://vocab.nerc.ac.uk/collection/L05/current/FFES",
           "description": "",
-          "title": ""
+          "title": "Descriptive Keyword"
         }
       ],
       "scheme": ""
diff --git a/indexer/src/test/resources/canned/sample8_stac.json b/indexer/src/test/resources/canned/sample8_stac.json
index d3dc1045..240043ee 100644
--- a/indexer/src/test/resources/canned/sample8_stac.json
+++ b/indexer/src/test/resources/canned/sample8_stac.json
@@ -570,82 +570,82 @@
     "concepts" : [ {
       "id" : "Current direction in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCDAZZ01",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Current speed in the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/383",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Eastward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCEWZZ01",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Northward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LCNSZZ01",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Upward current velocity in the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/LRZAZZZZ",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Practical salinity of the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Temperature of the water body",
       "url" : "http://vocab.nerc.ac.uk/collection/P01/current/TEMPPR01",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/565",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Pressure (measured variable) in the water body exerted by overlying sea water only",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/566",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Gravity",
       "url" : "http://vocab.ndg.nerc.ac.uk/term/P011/667/GRAVFLDX",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Sub-bottom structure",
       "url" : "N/A",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Abundance of biota",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/488",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Biovolume",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/22",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Sea-floor depth below surface of the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/574",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Sea-floor surface hardness",
       "url" : "N/A",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Density of the water body",
       "url" : "http://vocab.aodn.org.au/def/discovery_parameter/entity/401",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
@@ -653,7 +653,7 @@
     "concepts" : [ {
       "id" : "research vessel",
       "url" : "http://vocab.nerc.ac.uk/collection/L06/current/31",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
@@ -661,47 +661,47 @@
     "concepts" : [ {
       "id" : "current profilers",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/115",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "lowered current profilers",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/116/",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "CTD",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/130",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "gravimeters",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/158/",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "2000 Hz top-bandwidth sub-bottom penetrator and mud profiler systems",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/367/",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "Fish-finder echosounders",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/FFES",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "multi-beam echosounders",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/157",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "thermosalinographs",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/133",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     }, {
       "id" : "bathythermographs",
       "url" : "http://vocab.nerc.ac.uk/collection/L05/current/132",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : ""
diff --git a/indexer/src/test/resources/canned/sample_abstract_citation_null_stac.json b/indexer/src/test/resources/canned/sample_abstract_citation_null_stac.json
index d0943ae7..526568fe 100644
--- a/indexer/src/test/resources/canned/sample_abstract_citation_null_stac.json
+++ b/indexer/src/test/resources/canned/sample_abstract_citation_null_stac.json
@@ -252,7 +252,7 @@
     "concepts" : [ {
       "id" : "Global / Oceans | West Equatorial Pacific Ocean",
       "url" : "https://marlin.csiro.au/geonetwork/srv/eng/xml.keyword.get?thesaurus=register.place.urn:marlin.csiro.au:definedregions&id=urn:marlin.csiro.au:definedregions:concept:1021",
-      "title" : "",
+      "title" : "Descriptive Keyword",
       "description" : ""
     } ],
     "scheme" : "place"