DocsOverview
What is JSON Schema?Getting Started
Creating your first schemaExamples
Miscellaneous examplesModelling a file systemOther examplesReference
JSON Schema GlossaryLearn JSON SchemaUnderstanding JSON SchemaConventions used in this bookWhat is a schema?
The basics
Hello, World!The type keywordDeclaring a JSON SchemaDeclaring a unique identifierJSON Schema Reference
Type-specific keywordsstringregular expressionsnumeric typesobjectarraybooleannullGeneric keywordsMedia: string-encoding non-JSON dataSchema CompositionApplying Subschemas ConditionallyDeclaring a DialectJSON Schema Reference
enumerated valuesannotationsconstant valuescommentsStructuring a complex schema
Schema IdentificationBase URI$ref$defsRecursionExtending Recursive SchemasBundlingSpecification
OverviewSpecificationConstant values¶
New in draft 6The const keyword is used to restrict a value to a single value.
For example, if you only support shipping to the United States for export reasons:
schema1
{2
"properties": {3
"country": {4
"const": "United States of America"5
}6
}7
}data
1
{ "country": "United States of America" }
compliant to schemadata
1
{ "country": "Canada" }
not compliant to schema