litvar: change SYMBOL -> NCBIGene

also updated biolink-version, comments, example for endpoint

litvar/smartapi.yaml

@@ -16,7 +16,7 @@ info:
     component: KP
     team:
       - Service Provider
-    biolink-version: "2.1.0"
+    biolink-version: "2.2.3"
 servers:
 - url: https://www.ncbi.nlm.nih.gov/research/bionlp/litvar/api/v1
   description: Production server
@@ -30,7 +30,7 @@ paths:
       parameters:
       - name: variantid
         in: path
-        example: rs121913527
+        example: rs121913527##
         description: rsid
         required: true
         schema:
@@ -42,12 +42,13 @@ paths:
       - "$ref": "#/components/x-bte-kgs-operations/variant_located_in_gene"
 components:
   x-bte-kgs-operations:
+  ## API does not support the reverse operation
     variant_located_in_gene:
     - inputs:
       - id: DBSNP
         semantic: SequenceVariant
       outputs:
-      - id: SYMBOL
+      - id: NCBIGene
         semantic: Gene
       predicate: is_sequence_variant_of
       source: "infores:dbsnp"
@@ -58,4 +59,4 @@ components:
         "$ref": "#/components/x-bte-response-mapping/variant_located_in_gene"
   x-bte-response-mapping:
     variant_located_in_gene:
-      SYMBOL: gene.name
+      SYMBOL: gene.id  ## no prefix