Feature Request: Add validators for LocalBusiness, Article, Event, FAQPage, and other common types, and child schema validation

[gsriram24]

Summary

The library currently returns zero validation errors for several commonly-used schema.org types that Google Rich Results actively supports, including LocalBusiness, Article, Event, FAQPage, HowTo, WebSite, and WebPage.

Reproduction

const testData = {
  jsonld: {
    LocalBusiness: [{
      '@type': 'LocalBusiness'
      // Missing required fields: name, address, etc.
    }]
  },
  microdata: {},
  rdfa: {},
  errors: []
};

const issues = await validator.validate(testData);
console.log(issues.length); // 0 — No errors reported

Expected Behavior

The validator should report missing required fields per Google's structured data guidelines.

For example, LocalBusiness should validate:

Required:

• name
• address (PostalAddress object)

Recommended:

• telephone
• openingHoursSpecification
• geo (GeoCoordinates)
• image
• priceRange

Schema Types Affected

Type	Google Rich Results Page
LocalBusiness	docs
Article	docs
Event	docs
FAQPage	docs
HowTo	docs
WebSite	docs
WebPage	Part of various structured data types

Impact

Users may believe their structured data is valid when critical fields are missing, leading to:

• Failed rich result eligibility in Google Search
• Poor SEO outcomes
• Confusion when Google Search Console reports errors that this validator missed

Proposed Solution

Add validator classes for the missing types following the existing pattern. Example:

// src/types/LocalBusiness.js
import BaseValidator from './base.js';

export default class LocalBusinessValidator extends BaseValidator {
  getConditions() {
    return [
      this.required('name'),
      this.required('address', 'object'),
      this.recommended('telephone'),
      this.recommended('openingHoursSpecification', 'array'),
      this.recommended('geo', 'object'),
      this.recommended('image', 'url'),
      this.recommended('priceRange'),
    ].map((c) => c.bind(this));
  }
}

Then register in src/Validator.js:

this.registeredHandlers = {
  // ... existing handlers
  LocalBusiness: [() => import('./types/LocalBusiness.js')],
};

Problem: Subtypes are not validated

Currently, if a schema uses a subtype like Restaurant, NewsArticle, or MusicEvent, the validator returns zero errors even when required fields are missing.

Example:
const data = {
jsonld: {
Restaurant: [{
'@type': 'Restaurant'
// Missing name, address - but no errors reported!
}]
},
microdata: {},
rdfa: {},
errors: []
};

const issues = await validator.validate(data);
console.log(issues.length); // 0 — No validation!