PROPOSED STATE: This integration profile is currently in a proposed state and is under community review. The specification may change based on feedback and implementation experience.

Basic Profile

Purpose and Use Cases

The Basic Profile defines essential metadata properties that should be included with all metaverse assets, regardless of their specific type or application. This profile serves as the foundation for all other integration profiles and ensures a minimum level of interoperability across platforms.

Key Use Cases:

• Asset discovery and search functionality
• Basic asset management and organization
• Attribution and rights management
• Cross-platform asset sharing

Required Properties

The following properties must be included in all metaverse assets:

{
  "@context": {
    "@vocab": "https://schema.org/",
    "mvmd": "https://mvmd.org/v1/"
  },
  "@type": "CreativeWork",
  
  "name": "Asset Name",
  "description": "Detailed description of the asset",
  
  "identifier": {
    "@type": "PropertyValue",
    "propertyID": "MVMD-ID",
    "value": "asset-2024-001"
  },
  
  "creator": {
    "@type": "Organization",
    "name": "Creator Name",
    "url": "https://example.com/creator"
  },
  
  "dateCreated": "2024-03-15",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  
  "contentUrl": "https://example.com/assets/file.ext",
  "encodingFormat": "application/octet-stream"
}

Property	Description	Type	Notes
@context	Vocabulary declaration	Object	Must include Schema.org
@type	Asset type	String	Must be a valid Schema.org type
name	Asset name	String	Max 100 characters
description	Detailed description	String	Max 1000 characters
identifier	Unique identifier	Object	Must include propertyID and value
creator	Asset creator	Object	Must include name
dateCreated	Creation date	String	ISO 8601 format
license	Usage license	String	Valid URL
contentUrl	Asset location	String	Valid URL
encodingFormat	File format	String	Valid MIME type

Optional Properties

The following properties enhance asset functionality and can be included as needed:

{
  // Required properties as above...
  
  "version": "1.0.0",
  "dateModified": "2024-03-15T10:30:00Z",
  
  "thumbnail": "https://example.com/thumbnails/asset.jpg",
  
  "contributor": [{
    "@type": "Person",
    "name": "Contributor Name",
    "role": "Designer"
  }],
  
  "keywords": ["metaverse", "asset", "category"],
  
  "copyrightHolder": {
    "@type": "Organization",
    "name": "Rights Holder"
  },
  
  "maintainer": {
    "@type": "Organization",
    "name": "Maintenance Team"
  },
  
  "fileSize": "1048576"
}

Property	Description	Type	Notes
version	Asset version	String	Semantic versioning recommended
dateModified	Modification date	String	ISO 8601 format
thumbnail	Preview image	String	Valid URL
contributor	Additional contributors	Array	List of persons or organizations
keywords	Search terms	Array	List of relevant terms
copyrightHolder	Rights owner	Object	Person or Organization
maintainer	Maintenance entity	Object	Person or Organization
fileSize	File size in bytes	Number	Integer value

Type-Specific Properties

The Basic Profile can be extended with type-specific properties based on the asset's @type value:

3D Model Properties

{
  "@context": {
    "@vocab": "https://schema.org/",
    "mvmd": "https://mvmd.org/v1/"
  },
  "@type": "3DModel",
  
  // Required properties as above...
  
  "encodingFormat": "model/gltf-binary",
  
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "propertyID": "geometryProperties",
      "name": "Geometry Properties",
      "value": {
        "polyCount": 10000,
        "textureResolution": 2048,
        "materialCount": 5
      }
    }
  ]
}

Virtual Space Properties

{
  "@context": {
    "@vocab": "https://schema.org/",
    "mvmd": "https://mvmd.org/v1/"
  },
  "@type": "Place",
  
  // Required properties as above...
  
  "maximumAttendeeCapacity": 100,
  
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "propertyID": "spaceProperties",
      "name": "Space Properties",
      "value": {
        "worldSize": "1000x1000",
        "spawnPoints": 2,
        "environmentType": "indoor"
      }
    }
  ]
}

Validation Rules

Required Fields Validation

• @context: Must include Schema.org
• @type: Must be a valid Schema.org type
• name: Non-empty string, max 100 characters
• description: Non-empty string, max 1000 characters
• identifier: Must include propertyID and value
• creator: Must include name
• dateCreated: ISO 8601 format
• license: Valid URL
• contentUrl: Valid URL
• encodingFormat: Valid MIME type

Optional Fields Validation

• version: String, recommended semantic versioning
• dateModified: ISO 8601 format
• thumbnail: Valid URL
• contributor: Must include name
• keywords: Array of strings
• fileSize: Positive integer

Complete Example

{
  "@context": {
    "@vocab": "https://schema.org/",
    "mvmd": "https://mvmd.org/v1/"
  },
  "@type": "3DModel",
  
  "name": "Modern Office Chair",
  "description": "Ergonomic office chair with adjustable height and tilt mechanisms. Suitable for professional office environments.",
  
  "identifier": {
    "@type": "PropertyValue",
    "propertyID": "MVMD-ID",
    "value": "furniture-2024-001"
  },
  
  "creator": {
    "@type": "Organization",
    "name": "Virtual Furnishings Inc.",
    "url": "https://example.com/virtual-furnishings"
  },
  
  "dateCreated": "2024-03-15",
  "dateModified": "2024-03-15T10:30:00Z",
  "version": "1.0.0",
  
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "copyrightHolder": {
    "@type": "Organization",
    "name": "Virtual Furnishings Inc."
  },
  
  "contentUrl": "https://example.com/models/office-chair.glb",
  "encodingFormat": "model/gltf-binary",
  "fileSize": 1048576,
  
  "thumbnail": "https://example.com/thumbnails/office-chair.jpg",
  
  "keywords": ["furniture", "office", "chair", "ergonomic"],
  
  "additionalProperty": [
    {
      "@type": "PropertyValue",
      "propertyID": "geometryProperties",
      "name": "Geometry Properties",
      "value": {
        "polyCount": 12500,
        "textureResolution": 2048,
        "materialCount": 3,
        "animationCount": 0
      }
    },
    {
      "@type": "PropertyValue",
      "propertyID": "physicalProperties",
      "name": "Physical Properties",
      "value": {
        "dimensions": {
          "width": 0.65,
          "height": 1.2,
          "depth": 0.65,
          "unit": "meters"
        },
        "weight": {
          "value": 15,
          "unit": "kg"
        }
      }
    }
  ]
}

Implementation Considerations

Cross-Platform Compatibility

• Use standard Schema.org types and properties wherever possible
• Provide fallback values for platform-specific properties
• Test across multiple platforms to ensure consistent rendering

Performance Optimization

• Include appropriate file sizes for different target platforms
• Consider providing multiple levels of detail (LOD)
• Optimize thumbnail images for quick loading

Rights Management

• Ensure license field accurately reflects usage rights
• Include attribution requirements in the description if needed
• Document any platform-specific rights limitations

Related Resources

• Types of Assets: Different asset types supported by MVMD
• Metadata Fundamentals: Core metadata principles
• Schema.org Standard: Detailed information on Schema.org properties