Definition
A conditional HTTP request supplies a validator from a previously retrieved representation. For catalog reads, a client can send an entity tag in If-None-Match. An unchanged representation can produce a 304 Not Modified response, allowing reuse of the stored body. This is a transport validation mechanism, not a test of product truth.
Why It Matters
- Repeatedly fetching large unchanged product payloads can consume integration bandwidth without adding decision evidence.
- The Commerce Intelligence OS framework should distinguish a successful source check from a product attribute update. Those timestamps answer different operational questions.
How It Works
- Store the representation and its entity tag together with the source URL, tenant, authorization scope, and relevant representation variants.
- Send the saved tag with the next conditional GET. For a 304, retain the existing body and refresh applicable response metadata; do not parse the empty response as a new catalog.
- For a 200, validate the new body before atomically replacing the saved representation and validator. If no usable local body exists, retrieve a complete representation.
- Handle authentication failures, removals, and server errors independently. An unchanged source representation does not prove that downstream search or agent stores have applied it.
Ecommerce Example
Context: Illustrative example: an integration has a validated product document and its ETag. Its next scheduled request receives 304.
Recommended move: Reuse that document and record that the source check succeeded. Do not erase product attributes because the response has no replacement body.
Why it matters: A separate reconciliation check verifies the search index contains the expected product version. This is a proposed integration design, not a deployed iKawn performance claim.
iKawn Framework
Bind
The iKawn framework links a cached representation to its source context.
Validate
Use the source validator when the endpoint supports it.
Retain
Keep the last validated body available for unchanged responses.
Reconcile
Measure downstream application separately from source transport status.
Concise Summary
Conditional reads can avoid transferring unchanged catalog bodies. Keep validators and cached content together, and separate source validation from downstream synchronization.