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JSON Schema — Structure Your Data
JSON Schema is a vocabulary for annotating and validating JSON documents. It defines allowed types, required properties, formats (email, date), and custom rules. Tools like Ajv (JavaScript) and jsonschema (Python) validate data against schemas.
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"name": {"type": "string"},
"age": {"type": "number", "minimum": 0},
"email": {"type": "string", "format": "email"}
},
"required": ["name", "email"]
}