What does Present mean?

Present means the field exists in at least one relevant location in the feed payload.

What does Invalid mean?

Invalid means the field is present but malformed, inconsistent, or outside expected parser constraints.

Yes, use the Bulk Analyzer heatmap to compare key capabilities side by side.

Learn how to read feed field coverage, validity, and deterministic diagnostics in the RSS Inspector capability matrix.

The capability matrix shows which feed fields are present, valid, and countable across RSS and Atom documents.

Developers, SEO teams, and publishers who need predictable feed quality checks without black box scoring.

Use matrix output for feed onboarding reviews, parser migration QA, and publisher quality scorecards.

A field-by-field matrix, deterministic validity states, supporting examples, and feed-level metrics.

The matrix surfaces structural errors early.

Start with invalid fields first, then resolve missing fields that your parser requires for ranking and deduplication.

Treat Present as coverage, Valid as reliability, and Invalid as breakage risk for downstream consumers.

Feed fetches use SSRF-safe validation and deterministic metric calculations so results are repeatable and safer to run in production workflows.

Export JSON for complete audits and CSV for spreadsheet triage and stakeholder sharing.

If many fields are present but invalid, the feed likely has formatting drift rather than missing data.

Typical cause: date format changes, malformed GUID values, or invalid namespace usage
Next check: inspect raw payload for one failing item and compare against one passing item

If core fields are missing entirely, this is usually a source-template problem, not a parser bug.

Typical cause: upstream feed template no longer outputs required channel/item fields
Next check: verify CMS/export template and then rerun inspection before rollout