Align schema implementation scope with Southern Destinations plan (Yoast graph-first P1)

[Copilot]

• Review issue Update the JSON-LD schema output class integrating with Yoast SEO #1143 and the Southern Destinations schema implementation plan
• Audit existing legacy schema classes, metabox configs, and field meta keys
• Create includes/classes/schema/class-lsx-to-schema-helpers.php
• Create includes/classes/schema/pieces/class-lsx-to-schema-trip.php
• Create includes/classes/schema/pieces/class-lsx-to-schema-accommodation.php
• Create includes/classes/schema/pieces/class-lsx-to-schema-destination.php
• Update includes/classes/legacy/class-schema.php
• Add tests/php/TestSchemaHelpers.php
• Run helper tests (25/25 pass via PHP CLI)
• Address code review: variadic apply_filters stub, WPSEO_Schema_IDs constant guard, official rating types filter, JSON_HEX_TAG/HEX_AMP XSS hardening

Original prompt

Please review my schema plan. I would like you to implement that in a new branch off of develop.

This is the github issue, but the description is slightly incorrect.
#1143

Created from VS Code.

[chatgpt-codex-connector]

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[krugazul]

Schema.org Audit — Graph Pieces vs. Spec

Reviewed the three schema pieces against the official specs at schema.org/Trip, schema.org/Accommodation, and schema.org/TouristDestination.

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Trip (class-lsx-to-schema-trip.php)

Property	Status	Issue	Recommended Fix
slogan	❌ Invalid	slogan belongs to Organization/Brand — not Trip or Thing	Move to additionalProperty or alternateName
duration	❌ Invalid	duration is a property of Event/MediaObject, not Trip	Always use additionalProperty
fromLocation	❌ Invalid	Does not exist on Trip	Rename to tripOrigin (the correct schema.org property)
toLocation	❌ Invalid	Does not exist on Trip	Move destination into the itinerary property (Place | ItemList) or drop
@type: 'Trip'	⚠️ Sub-optimal	A more specific child type exists	Use TouristTrip (schema.org subtype, used in official examples)
subTrip items typed as Trip	⚠️ Sub-optimal	Consistency	Type as TouristTrip too
itinerary, offers, provider, subTrip, name, description, image, url, mainEntityOfPage, additionalProperty	✅ Valid	—	—

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Accommodation (class-lsx-to-schema-accommodation.php)

Property	Status	Issue	Recommended Fix
slogan	❌ Invalid	Not a property of Accommodation, Place, or Thing	Remove or use additionalProperty
checkinTime	❌ Invalid	Property of LodgingBusiness, not Accommodation	Change @type (see note below)
checkoutTime	❌ Invalid	Property of LodgingBusiness, not Accommodation	Change @type (see note below)
availableLanguage	❌ Invalid	Property of ContactPoint/LodgingBusiness, not Accommodation	Change @type (see note below)
starRating	❌ Invalid	Property of LodgingBusiness, not Accommodation	Change @type (see note below)
offers	⚠️ Warning	Not listed for Accommodation	Change @type (see note below)
numberOfRooms, address, geo, containedInPlace, additionalProperty, name, description, image, url	✅ Valid	—	—

Root fix: Change @type from 'Accommodation' to 'LodgingBusiness'. LodgingBusiness inherits from both Place (giving address, geo, containedInPlace) and LocalBusiness (giving checkinTime, checkoutTime, availableLanguage, starRating, offers, numberOfRooms). All currently-invalid properties become valid with this single change.

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TouristDestination (class-lsx-to-schema-destination.php)

Property	Status	Issue	Recommended Fix
slogan	❌ Invalid	Not a property of TouristDestination, Place, or Thing	Remove or use additionalProperty
safetyConsideration	❌ Invalid	Property of Product/WebContent — not Place or TouristDestination	Move to additionalProperty
touristType, containedInPlace, containsPlace, address, geo, additionalProperty, name, description, image, url, mainEntityOfPage	✅ Valid	—	—

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Summary of required fixes

Fix type	Changes
Rename property	Trip: fromLocation → tripOrigin
Remove / demote to additionalProperty	slogan (all 3 pieces), duration on Trip (remove direct property — the additionalProperty fallback already handles it), toLocation on Trip, safetyConsideration on Destination
Change @type	Trip: 'Trip' → 'TouristTrip' (+ subTrip items); Accommodation: 'Accommodation' → 'LodgingBusiness' (resolves 5 invalid properties at once)