Linting Guide
RFC 5545 vs Basic iCal Linting for OTA and PMS Reliability
Use linting as a first gate, then validate real import and booking behavior before release.
What linting does well
Linting catches format issues early and improves hygiene.
It does not prove downstream booking behavior, imported coverage, or blocked-date accuracy.
When linting alone is not enough
The linter passes but the OTA still rejects the feed.
The feed imports successfully but the timeline is wrong.
No hard errors appear, but event coverage is incomplete.
Why teams outgrow syntax-only checks
Consumers produce different outcomes from the same feed because interpretation and business rules differ.
Behavior evidence resolves ambiguity faster than prolonged spec debate.
Recommended validation sequence
-
Step 1
Run lint checks
Catch obvious format defects first.
-
Step 2
Import as a subscription
Test realistic consumer behavior using the source URL.
-
Step 3
Inspect logs and events
Confirm imported coverage, statuses, and date windows.
-
Step 4
Validate timeline result
Check the final business outcome rather than stopping at parser success.
When to use each approach
| Approach | Best for | Not enough for |
|---|---|---|
| Linting | Format quality gates and CI checks | Availability incidents and business mismatches |
| Behavior validation | Real sync debugging and release validation | Pure text conformance in isolation |
| Both together | Production-safe workflow | Nothing critical omitted |
Decision checklist
- Keep linting as a baseline quality gate.
- Escalate to behavior validation when blocked dates are wrong.
- Use known feeds for regression testing.
- Validate outcomes before release.
Run it live
Need more than a syntax pass?
Import the live ICS URL and validate the final booking behavior, not just the file text.
Validate Beyond LintingFAQ
Should I stop linting?
No. Keep linting as a baseline quality gate.
What does behavior validation add?
It proves the feed produces the correct availability outcome once it is fetched and imported.
When is linting enough on its own?
Only when you care about text validity in isolation rather than downstream booking behavior.
Related guides
View the full guide libraryValidation Hub
Ultimate Guide to iCal RFC 5545 Validation for Property Management
Comprehensive hub for OTA and PMS teams: RFC-aware validation workflow, behavior checks, and linked cluster guides for sync troubleshooting.
Validator Guide
RFC 5545 iCal Validator Workflow
Use an RFC 5545 iCal validator workflow that checks fetch, import, and blocked-night behavior instead of stopping at syntax-only linting.