Add sparse_vector field type (#2304)

Author: carlosdelest

output/schema/schema.json

@@ -197,6 +197,7 @@ export enum FieldType {
   constant_keyword,
   aggregate_metric_double,
   dense_vector,
+  sparse_vector,
   match_only_text
 }
 

output/typescript/types.ts

@@ -190,6 +190,10 @@ export class RankFeaturesProperty extends PropertyBase {
   type: 'rank_features'
 }
 
+export class SparseVectorProperty extends PropertyBase {
+  type: 'sparse_vector'
+}
+
 export class SearchAsYouTypeProperty extends CorePropertyBase {
   analyzer?: string
   index?: boolean

specification/_types/mapping/Property.ts

@@ -367,7 +367,7 @@ export class QueryContainer {
    */
   terms_set?: SingleKeyDictionary<Field, TermsSetQuery>
   /**
-   * Uses a natural language processing model to convert the query text into a list of token-weight pairs which are then used in a query against a rank features field.
+   * Uses a natural language processing model to convert the query text into a list of token-weight pairs which are then used in a query against a sparse vector or rank features field.
    * @availability stack since=8.8.0
    * @availability serverless
    * @doc_id query-dsl-text-expansion-query