Implementation Best Practices
This guide provides essential best practices for implementing MVMD-compliant metadata in your projects to ensure interoperability, performance, and maintainability.
Metadata Structure & Design
Schema Organization
- Use Consistent Namespaces: Always include proper context declarations for Schema.org and MVMD vocabularies
- Choose Appropriate Types: Select the most specific Schema.org type for your asset
- Follow Type Hierarchy: Respect parent-child relationships in Schema.org types
- Group Related Properties: Organize properties logically for readability
{
"@context": {
"@vocab": "https://schema.org/",
"mvmd": "https://mvmd.org/v1/"
},
"@type": "3DModel",
"name": "Example Asset",
"description": "This is an example of proper schema organization"
}
Identity & Reference Management
- Provide Unique Identifiers: Use consistent identification mechanisms
- Link Related Assets: Use proper references between related assets
- Maintain Reference Integrity: Ensure all references are valid and resolvable
- Support Multiple Reference Methods: Include both URIs and content-addressed references when possible
{
"@context": {
"@vocab": "https://schema.org/",
"mvmd": "https://mvmd.org/v1/"
},
"@type": "3DModel",
"@id": "https://example.com/assets/model-123",
"identifier": {
"@type": "PropertyValue",
"propertyID": "assetId",
"value": "model-123"
},
"sameAs": [
"ipfs://QmXaXa1XaX...",
"ar://asset/model123"
]
}
Technical Implementation
Performance Optimization
- Minimize Metadata Size: Include only necessary properties
- Use Appropriate Data Types: Match data types to expected values
- Implement Progressive Loading: Structure metadata to support incremental loading
- Balance Embedding vs. Linking: Reference large or commonly reused components
Validation & Testing
- Validate Against Schemas: Use MVMD validation tools for all metadata
- Test Cross-Platform Compatibility: Verify metadata works across different systems
- Check Reference Integrity: Ensure all linked resources are accessible
- Verify Required Properties: Confirm all required properties exist and have valid values
# Example validation command
npm run validate-mvmd ./assets/metadata.json
Version Control
- Include Version Information: Add version numbers to all metadata
- Document Version Compatibility: Specify which versions work together
- Maintain Backward Compatibility: Support older schema versions when possible
- Track Metadata Evolution: Keep history of metadata changes alongside asset changes
{
"@context": {
"@vocab": "https://schema.org/",
"mvmd": "https://mvmd.org/v1/"
},
"@type": "3DModel",
"name": "Example Asset",
"version": "2.1.0",
"additionalProperty": [
{
"@type": "PropertyValue",
"propertyID": "schemaVersion",
"name": "Schema Version",
"value": "1.2.0"
}
]
}
Content & Metadata Management
Rights Management
- Specify Clear Licenses: Include explicit license information
- Document Usage Rights: Define how assets can be used
- Credit Contributors: Include proper attribution for all creators
- Link to Terms: Provide references to detailed license terms
{
"@context": {
"@vocab": "https://schema.org/",
"mvmd": "https://mvmd.org/v1/"
},
"@type": "3DModel",
"name": "Example Asset",
"license": "https://creativecommons.org/licenses/by/4.0/",
"creator": {
"@type": "Person",
"name": "Asset Creator",
"url": "https://creator.example.com"
},
"copyrightHolder": {
"@type": "Organization",
"name": "Example Studio",
"url": "https://studio.example.com"
}
}
Documentation
- Include Comprehensive Metadata: Document all relevant asset characteristics
- Add Implementation Notes: Provide guidance for developers working with your assets
- Document Technical Requirements: Specify system requirements and dependencies
- Maintain Technical Documentation: Keep documentation in sync with metadata changes
Storage & Distribution
- Use Content-Addressed Storage: Implement content-addressed storage for immutability
- Implement CDN Delivery: Use content delivery networks for efficient distribution
- Configure Proper Caching: Set appropriate cache control headers
- Plan for Redundancy: Use multiple storage solutions for critical assets
Process & Workflow
Integration Pipeline
- Automate Metadata Generation: Build automated tools to create and update metadata
- Implement Validation Checks: Add validation to your CI/CD pipeline
- Document Generation Process: Create clear documentation for metadata generation
- Review Generated Metadata: Periodically review automated output for quality
Maintenance Strategy
- Establish Update Procedures: Define processes for metadata updates
- Monitor Reference Health: Regularly check that all references remain valid
- Plan for Schema Evolution: Prepare for future schema changes
- Implement Deprecation Policies: Create clear policies for obsolete assets and formats
Related Resources
- Metadata Fundamentals: Understanding core metadata concepts
- Types of Assets: Different asset types and their requirements
- Validation Tools: Tools for validating MVMD compliance
Related Documentation
- Schema.org: Core vocabulary for metadata structure
- 3D Standards Overview: Implementation patterns for 3D assets
- Geospatial Standards Overview: Location data patterns
- Trust & Provenance: Authentication and verification
- OpenXR: XR-specific implementation patterns