Use index *.full.v2, change highlighting query

webapp/src/app/geosource/models/elasticsearch-options.model.ts

@@ -62,7 +62,7 @@ export class ElasticsearchOptions {
         'label-en': 'Formats',
         'aggregations': [],
         'activeFilters': [],
-        'type': 'number'
+        'type': 'string'
       },
       {
         'field': 'date_publication',

webapp/src/app/geosource/services/elasticsearch.service.ts

@@ -120,7 +120,8 @@ export class ElasticsearchService {
               'pre_tags': ['<span class="highlighted">'],
               'post_tags': ['</span>'],
               'require_field_match': false,
-              'type': 'unified',
+              'type': 'fvh',
+              'fragmenter': 'span',
               'order': 'score',
               'fields': {
                 '*': {

webapp/src/environments/environment.ts

@@ -7,7 +7,7 @@ export const environment = {
   production: false,
 
   elasticsearchUrl: {
-    full: 'http://localhost:8081/elasticsearch/*.full',
+    full: 'http://localhost:8081/elasticsearch/*.full.v2',
     meta: 'http://localhost:8081/elasticsearch/*.meta'
   },