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The Knowledge Graph API supports GraphQL introspection, so you can programmatically discover types, fields, and relationships at runtime.

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Explore the schema

Get all available types, explore a specific type (like Lesson), and more: 
<!-- Get all available types -->
query {
  __schema {
    types {
      name
      kind
      description
    }
  }
}

<!-- Explore a specific type (e.g., Lesson)
query {
  __type(name: "Lesson") {
    name
    fields {
      name
      type {
        name
        kind
      }
      description
    }
  }
}

<!-- Get all available queries -->
query {
  __schema {
    queryType {
      fields {
        name
        args {
          name
          type {
            name
          }
        }
      }
    }
  }
}

<!-- Get all relationship fields on a type -->
query {
  __type(name: "Lesson") {
    fields {
      name
      type {
        name
        ofType {
          name
        }
      }
    }
  }
}

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Entities

The GraphQL API includes the following entities:
DatasetEntities
Academic StandardsStandardsFramework, StandardsFrameworkItem
Learning ComponentsLearningComponent
CurriculumActivity, Assessment, ClassroomMaterial, Course, GlossaryTerm, InstructionalRoutine, Lesson, LessonGrouping, Material
Learner Variability NavigatorFactor, LearnerModel, Strategy

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Relationships

The GraphQL API includes the following relationships:
DatasetRelationships
Academic StandardsHasChildProperties, SupportsProperties, HasEducationalAlignmentProperties
Learning ComponentsSupportsProperties
Learning ProgressionsBuildsTowardsProperties, RelatesToProperties
Standards CrosswalksHasStandardAlignmentProperties
CurriculumHasPartProperties, HasEducationalAlignmentProperties, UsesRoutineProperties, UsesProperties, HasDependencyProperties, ReferencesProperties, MutuallyExclusiveWithProperties, HasReferenceProperties
Learner Variability NavigatorHasFactorProperties, HasStrategyProperties, InteractsWithFactorProperties, TargetsFactorProperties, RelevantToStandardProperties