Activity Streams 2.0 Detailed Research

Activity Streams 2.0 Standard Documentation

1. Purpose and Benefits

Overview

Activity Streams 2.0 is a JSON-based format for describing social activities, enabling standardized representation of social interactions and events across different platforms and applications.

Key Benefits

• Interoperability: Enables seamless data exchange between different social platforms and applications
• Standardization: Provides a consistent format for representing social activities
• Extensibility: Allows for custom vocabularies while maintaining compatibility
• Machine-readable: Facilitates automated processing and analysis of social data
• Platform Independence: Works across different platforms and technologies

2. Standard Requirements

Core Components

1. Actor

   • Must identify who performed the activity
   • Required properties: type, id
   • Example: Person, Organization, Application

2. Verb/Action

   • Must specify the action performed
   • Standard verbs like: create, update, delete, follow, like
   • Custom verbs must be clearly documented

3. Object

   • Must identify the target of the activity
   • Required properties: type, id
   • Can be any type of content or entity

4. Optional Components

   • target: The recipient of the activity
   • context: Additional contextual information
   • published: Timestamp of the activity
   • summary: Human-readable description

Format Requirements

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Activity",
  "actor": {
    "type": "Person",
    "id": "user123",
    "name": "John Doe"
  },
  "verb": "create",
  "object": {
    "type": "Note",
    "id": "note456",
    "content": "Hello, world!"
  },
  "published": "2024-11-05T12:00:00Z"
}

Validation Rules

1. All activities must include:

   • Valid JSON-LD context
   • Actor with type and id
   • Action/verb
   • Object with type and id

2. Timestamps must use ISO 8601 format

3. IDs must be unique and URL-compatible

3. Enforcement and Implementation

Development Practices

1. Code Review Requirements

   • All activity payloads must be validated against the schema
   • Custom types and verbs must be documented
   • Review checklist must include Activity Streams compliance

2. Automated Validation

   • Implement JSON Schema validation
   • Set up CI/CD pipeline checks
   • Use linting tools for Activity Streams format

3. Testing Requirements

   • Unit tests for activity generation
   • Integration tests for activity consumption
   • Validation tests for custom types

Monitoring and Compliance

1. Runtime Validation

   • Implement validation middleware
   • Log validation failures
   • Monitor compliance metrics

2. Documentation Requirements

   • All custom types must be documented
   • Implementation guides must be maintained
   • API documentation must include Activity Streams examples

3. Error Handling

   • Define standard error responses
   • Implement fallback behaviors
   • Provide clear error messages

Domain-Specific Implementation

Custom Types

{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "QuizActivity",
  "actor": {
    "type": "User",
    "id": "alitariksahin",
    "name": "Ali Tarık Şahin"
  },
  "verb": "solve",
  "object": {
    "type": "Quiz",
    "id": "quiz_356",
    "level": "C1",
    "title": "Local Cuisines"
  },
  "result": {
    "type": "Score",
    "score": 95,
    "maxScore": 100
  },
  "published": "2024-11-05T14:30:00Z"
}