# WIA-EDU-019 Digital Content Standard v2.0

## Phase 4: WIA Ecosystem Integration

**Status:** ✅ Complete
**Version:** 2.0.0
**Date:** 2025-01-15
**Philosophy:** 弘益人間 (Benefit All Humanity)

---

## 1. Overview

Phase 4 integrates the Digital Content Standard into the broader WIA ecosystem, enabling seamless interoperability with other WIA standards, global discovery, certification, and verifiable credentials.

## 2. Scope

Phase 4 covers:
- WIA Registry integration
- Cross-standard interoperability
- Certification framework
- Verifiable credentials (W3C VC)
- Global discovery and search
- Blockchain integration (optional)

## 3. WIA Registry Integration

### 3.1 Content Registration

```http
POST /wia/registry/content
Authorization: Bearer {wia_token}
Content-Type: application/json

{
  "standard": "WIA-EDU-019",
  "version": "2.0.0",
  "content": {
    "id": "urn:wia:content:123e4567-e89b-12d3-a456-426614174000",
    "title": "Introduction to Digital Content",
    "type": "video",
    "language": ["en", "ko"],
    "creator": "WIA Standards Organization",
    "publicationDate": "2025-01-15",
    "accessibility": {
      "wcagLevel": "AA",
      "features": ["captions", "transcript", "audioDescription"]
    },
    "license": "CC BY 4.0",
    "keywords": ["education", "digital content", "standards"]
  },
  "certification": {
    "level": "Full Compliance",
    "certificationId": "WIA-CERT-2025-001234",
    "issueDate": "2025-01-15",
    "expirationDate": "2028-01-15",
    "certifier": "WIA Certification Authority"
  }
}
```

**Response:**
```json
{
  "wiaId": "wia:content:123e4567",
  "registryUrl": "https://registry.wia.org/content/123e4567",
  "did": "did:wia:content:123e4567-e89b-12d3-a456-426614174000",
  "registeredAt": "2025-01-15T16:00:00Z"
}
```

### 3.2 Global Discovery

```http
GET /wia/registry/search
Content-Type: application/json

{
  "query": "digital content standards",
  "filters": {
    "standards": ["WIA-EDU-019"],
    "wcagLevel": ["AA", "AAA"],
    "languages": ["en", "ko"],
    "licenses": ["CC BY", "CC BY-SA"],
    "certified": true
  },
  "sort": "relevance"
}
```

## 4. Cross-Standard Interoperability

### 4.1 Integration with WIA-EDU-008 (Digital Textbook)

```json
{
  "contentId": "wia:content:123",
  "relatedStandards": {
    "WIA-EDU-008": {
      "role": "supplementary",
      "textbookId": "urn:isbn:978-3-16-148410-0",
      "chapters": [3, 4, 5]
    }
  }
}
```

### 4.2 Integration with WIA-INTENT

```javascript
// WIA-INTENT integration for smart content discovery
{
  "intent": {
    "action": "learn",
    "subject": "digital content standards",
    "level": "intermediate",
    "format": "video",
    "language": "en",
    "accessibility": "captions"
  },
  "matchingContent": [
    {
      "id": "wia:content:123",
      "relevanceScore": 0.98,
      "matchReason": "Exact match for all criteria"
    }
  ]
}
```

### 4.3 Integration with WIA-SOCIAL

Share and collaborate on content:

```javascript
{
  "socialIntegration": {
    "shareUrl": "https://wia.social/content/123",
    "discussions": "https://wia.social/discuss/content-123",
    "reviews": {
      "averageRating": 4.8,
      "totalReviews": 127,
      "url": "https://wia.social/reviews/content-123"
    },
    "collections": [
      {
        "id": "collection-456",
        "name": "Best Educational Videos 2025",
        "curator": "educator-user-789"
      }
    ]
  }
}
```

## 5. Certification Framework

### 5.1 Certification Levels

| Level | Requirements | Validity | Cost |
|-------|--------------|----------|------|
| Phase 1 | Content format compliance | 1 year | $300 |
| Phases 1-2 | + API compliance | 2 years | $800 |
| Phases 1-3 | + Distribution protocol | 2 years | $1,500 |
| Full (1-4) | Complete WIA integration | 3 years | $2,500 |

### 5.2 Certification Process

```javascript
{
  "certificationRequest": {
    "contentId": "content-123",
    "targetLevel": "Full Compliance",
    "applicant": {
      "organization": "Example Publishing",
      "contact": "cert@example.com"
    },
    "documentation": {
      "technicalSpecs": "https://example.com/specs.pdf",
      "accessibilityReport": "https://example.com/a11y-report.pdf",
      "testResults": "https://example.com/test-results.pdf"
    }
  }
}
```

**Certification Badge:**
```json
{
  "badge": {
    "id": "WIA-CERT-2025-001234",
    "standard": "WIA-EDU-019",
    "level": "Full Compliance",
    "issueDate": "2025-01-15",
    "expirationDate": "2028-01-15",
    "badgeUrl": "https://cert.wia.org/badge/001234.svg",
    "verificationUrl": "https://cert.wia.org/verify/001234"
  }
}
```

## 6. Verifiable Credentials

### 6.1 W3C Verifiable Credentials for Content Certification

```json
{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://wia.org/credentials/v1"
  ],
  "type": ["VerifiableCredential", "WIAContentCertificate"],
  "issuer": {
    "id": "did:wia:issuer:certification-authority",
    "name": "WIA Certification Authority"
  },
  "issuanceDate": "2025-01-15T00:00:00Z",
  "expirationDate": "2028-01-15T00:00:00Z",
  "credentialSubject": {
    "id": "did:wia:content:123e4567-e89b-12d3-a456-426614174000",
    "contentTitle": "Introduction to Digital Content",
    "standard": "WIA-EDU-019",
    "version": "2.0.0",
    "certificationLevel": "Full Compliance",
    "wcagLevel": "AA",
    "accessibility": {
      "captions": true,
      "audioDescription": true,
      "transcript": true
    }
  },
  "proof": {
    "type": "Ed25519Signature2020",
    "created": "2025-01-15T10:00:00Z",
    "verificationMethod": "did:wia:issuer:certification-authority#key-1",
    "proofPurpose": "assertionMethod",
    "proofValue": "z3FXQjecWJRJPz7z4..."
  }
}
```

### 6.2 Learner Achievement Credentials

```json
{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://wia.org/credentials/v1"
  ],
  "type": ["VerifiableCredential", "LearningAchievement"],
  "issuer": "did:wia:institution:university-123",
  "issuanceDate": "2025-01-20T00:00:00Z",
  "credentialSubject": {
    "id": "did:wia:learner:student-456",
    "achievement": {
      "type": "Course Completion",
      "name": "Digital Content Standards Mastery",
      "description": "Completed comprehensive training on WIA-EDU-019",
      "criteria": {
        "contentCompleted": [
          "wia:content:123",
          "wia:content:456",
          "wia:content:789"
        ],
        "assessmentScore": 0.95,
        "practicalProjects": 3
      }
    }
  },
  "proof": { ... }
}
```

## 7. Blockchain Integration (Optional)

### 7.1 Content Hash Registration

```javascript
// Register content hash on blockchain for immutability
{
  "blockchain": {
    "network": "ethereum",
    "contract": "0x123...",
    "transaction": "0xabc...",
    "contentHash": "0x3f7a8b2c1d4e5f6a7b8c9d0e1f2a3b4c...",
    "timestamp": 1642694400,
    "registrant": "0x456..."
  }
}
```

### 7.2 Smart Contract for Licensing

```solidity
// Simplified example
pragma solidity ^0.8.0;

contract WIAContentLicense {
    struct License {
        address creator;
        string contentId;
        string licenseType;
        uint256 price;
        bool active;
    }

    mapping(string => License) public licenses;

    function registerLicense(
        string memory contentId,
        string memory licenseType,
        uint256 price
    ) public {
        licenses[contentId] = License({
            creator: msg.sender,
            contentId: contentId,
            licenseType: licenseType,
            price: price,
            active: true
        });
    }

    function purchaseLicense(string memory contentId) public payable {
        License storage license = licenses[contentId];
        require(license.active, "License not active");
        require(msg.value >= license.price, "Insufficient payment");

        payable(license.creator).transfer(msg.value);
        // Issue license NFT or credential
    }
}
```

## 8. Analytics and Reporting

### 8.1 Global Analytics Dashboard

```json
{
  "globalAnalytics": {
    "totalContent": 15234,
    "certifiedContent": 8912,
    "totalViews": 45000000,
    "languages": 32,
    "wcagAACompliant": 12456,
    "topCategories": [
      {"category": "STEM Education", "count": 4523},
      {"category": "Language Learning", "count": 3421},
      {"category": "Professional Development", "count": 2987}
    ],
    "geographicDistribution": {
      "Americas": 42.3,
      "Europe": 28.7,
      "Asia": 24.1,
      "Africa": 3.2,
      "Oceania": 1.7
    }
  }
}
```

## 9. API Gateway

### 9.1 Unified WIA API

```http
GET /wia/v2/content/{id}
Authorization: Bearer {wia_token}
X-WIA-Standard: WIA-EDU-019
```

**Unified Response:**
```json
{
  "wia": {
    "id": "wia:content:123",
    "did": "did:wia:content:123e4567",
    "standard": "WIA-EDU-019",
    "version": "2.0.0",
    "certified": true,
    "certificationLevel": "Full Compliance"
  },
  "content": { ... },
  "certification": { ... },
  "credentials": [ ... ],
  "relatedContent": [ ... ],
  "socialData": { ... }
}
```

## 10. Interoperability Standards

### 10.1 Supported Standards

- ✅ W3C Verifiable Credentials
- ✅ Schema.org structured data
- ✅ Dublin Core metadata
- ✅ SCORM 2004
- ✅ xAPI (Experience API)
- ✅ LTI 1.3
- ✅ IMS Global OneRoster
- ✅ IEEE LOM (Learning Object Metadata)

## 11. Future Roadmap

### 11.1 Upcoming Features

- AI-powered content recommendations
- Automated accessibility enhancement
- Real-time collaboration tools
- Advanced analytics with ML insights
- Quantum-safe cryptography
- Metaverse/VR content support

---

**WIA-EDU-019 Complete Specification**
弘益人間 · Benefit All Humanity

## Summary

The WIA-EDU-019 Digital Content Standard provides a comprehensive framework for creating, distributing, and consuming digital educational content that is:

✅ **Universal** - Works everywhere, on any device
✅ **Accessible** - Available to all users, regardless of abilities
✅ **Interoperable** - Integrates seamlessly with existing systems
✅ **Verifiable** - Certified quality with blockchain-backed credentials
✅ **Discoverable** - Globally searchable through WIA Registry
✅ **Secure** - Protected with modern encryption and authentication
✅ **Sustainable** - Future-proof with extensible architecture

© 2025 WIA - World Certification Industry Association
MIT License