Add information for creating the batch named query

README.md

@@ -29,3 +29,30 @@ if you would like to view the SQL the migration will produce, you can use the fo
 ```bash
 dotnet ef migrations script -i -o .\migrate.sql -p Repository -s API
 ```
+
+### DLCS Named Query
+
+As part of handling assets in canvas paintings, items are ingested via the DLCS.  In order to track items that have been ingested, a new global named query needs to be added to the DLCS to track batches.  This can be done in 2 ways, as follows:
+
+1. POST to the named query endpoint:
+
+**NOTE:** This is required to be done as the admin customer using the DLCS API
+
+```
+POST {{baseUrl}}/customers/1/namedQueries
+
+{
+    "name": "batch-query",
+    "template": "batch=p1",
+    "global": true
+}
+```
+
+2. Directly into the DLCS database
+
+```sql
+INSERT INTO "NamedQueries" ("Id", "Customer", "Name", "Global", "Template")
+VALUES (gen_random_uuid(), 1, 'batch-query', true, 'batch=p1')
+```
+
+**NOTE:** the presentation API assumes the name of this named query is `batch-query` by default, so if this is changed the presentation will need an updated setting to track.