diff --git a/src/IntelliTect.Coalesce/Api/Controllers/ApiActionFilter.cs b/src/IntelliTect.Coalesce/Api/Controllers/ApiActionFilter.cs
index 68cc5f24..d9dc07f5 100644
--- a/src/IntelliTect.Coalesce/Api/Controllers/ApiActionFilter.cs
+++ b/src/IntelliTect.Coalesce/Api/Controllers/ApiActionFilter.cs
@@ -27,6 +27,8 @@ public class ApiActionFilter : IApiActionFilter
         protected readonly ILogger<ApiActionFilter> logger;
         protected readonly IOptions<CoalesceOptions> options;
 
+        private static readonly MediaTypeHeaderValue RefTypeHeader = new MediaTypeHeaderValue("application/json+ref");
+
         public ApiActionFilter(ILogger<ApiActionFilter> logger, IOptions<CoalesceOptions> options)
         {
             this.logger = logger;
@@ -119,8 +121,7 @@ public virtual void OnActionExecuted(ActionExecutedContext context)
 
             if (context.Result is ObjectResult result)
             {
-                var refHeader = new MediaTypeHeaderValue("application/json+ref");
-                if (context.HttpContext.Request.GetTypedHeaders().Accept.Any(h => h.IsSubsetOf(refHeader)))
+                if (context.HttpContext.Request.GetTypedHeaders().Accept.Any(h => h.IsSubsetOf(RefTypeHeader)))
                 {
                     var jsonOptions = context.HttpContext.RequestServices.GetService<IOptions<JsonOptions>>()?.Value ?? new JsonOptions
                     {
diff --git a/src/IntelliTect.Coalesce/Api/Controllers/CoalesceJsonReferenceHandler.cs b/src/IntelliTect.Coalesce/Api/Controllers/CoalesceJsonReferenceHandler.cs
index ef16d8ea..7ec245fc 100644
--- a/src/IntelliTect.Coalesce/Api/Controllers/CoalesceJsonReferenceHandler.cs
+++ b/src/IntelliTect.Coalesce/Api/Controllers/CoalesceJsonReferenceHandler.cs
@@ -7,7 +7,10 @@
 
 namespace IntelliTect.Coalesce.Api.Controllers;
 
-
+/// <summary>
+/// A modified implementation of the default <see cref="PreserveReferenceResolver"/> that
+/// avoids putting IDs/refs on items that will never be duplicated (the root response, and collections).
+/// </summary>
 internal sealed class CoalesceJsonReferenceHandler : ReferenceHandler
 {
     public override ReferenceResolver CreateResolver() => new PreserveReferenceResolver();