pystac.validation.stac_validator

exception pystac.validation.stac_validator.GetSchemaError(href: str, error: Exception)

Raised when unable to fetch a schema.

class pystac.validation.stac_validator.JsonSchemaSTACValidator(schema_uri_map: SchemaUriMap | None = None)

Validate STAC based on JSON Schemas.

This validator uses JSON schemas, read from URIs provided by a SchemaUriMap, to validate STAC core objects and extensions.

Parameters:

schema_uri_map – The SchemaUriMap that defines where the validator will retrieve the JSON schemas for validation. Defaults to an instance of DefaultSchemaUriMap

Note: This class requires the jsonschema library to be installed.

get_schema_from_uri(schema_uri: str) → tuple[dict[str, Any], Any]

DEPRECATED

property registry: Any

schema_cache: dict[str, dict[str, Any]]

schema_uri_map: SchemaUriMap

validate_core(stac_dict: dict[str, Any], stac_object_type: STACObjectType, stac_version: str, href: str | None = None) → str | None

Validate a core stac object.

Return value can be None or specific to the implementation.

Parameters:

• stac_dict – Dictionary that is the STAC json of the object.

• stac_object_type – The stac object type of the object encoded in stac_dict. One of STACObjectType.

• stac_version – The version of STAC to validate the object against.

• href – Optional HREF of the STAC object being validated.

Returns:

URI for the JSON schema that was validated against, or None if

no validation occurred.

Return type:

str

Raises:

STACValidationError if stac_dict is not valid. The exception is raised from – the “best” error, as determined by the jsonschema library. To access all jsonschema validation errors, use STACValidationError.source.

validate_extension(stac_dict: dict[str, Any], stac_object_type: STACObjectType, stac_version: str, extension_id: str, href: str | None = None) → str | None

Validate an extension stac object.

Return value can be None or specific to the implementation.

Parameters:

• stac_dict – Dictionary that is the STAC json of the object.

• stac_object_type – The stac object type of the object encoded in stac_dict. One of STACObjectType.

• stac_version – The version of STAC to validate the object against.

• extension_id – The extension ID to validate against.

• href – Optional HREF of the STAC object being validated.

Returns:

URI for the JSON schema that was validated against, or None if

no validation occurred.

Return type:

str

Raises:

STACValidationError if stac_dict is not valid. The exception is raised from – the “best” error, as determined by the jsonschema library. To access all jsonschema validation errors, use STACValidationError.source.

class pystac.validation.stac_validator.STACValidator

STACValidator defines methods for validating STAC JSON. Implementations define methods for validating core objects and extension. By default the JsonSchemaSTACValidator is used by PySTAC; users can define their own STACValidator implementation and set that validator to be used by pystac by using the set_validator() method.

validate(stac_dict: dict[str, Any], stac_object_type: STACObjectType, stac_version: str, extensions: list[str], href: str | None = None) → list[Any]

Validate a STAC object JSON.

Parameters:

• stac_dict – Dictionary that is the STAC json of the object.

• stac_object_type – The stac object type of the object encoded in stac_dict. One of STACObjectType.

• stac_version – The version of STAC to validate the object against.

• extensions – Extension IDs for this stac object.

• href – Optional href of the STAC object being validated.

Returns:

List of return values from the validation calls for the

core object and any extensions. Element type is specific to the STACValidator implementation.

Return type:

List[Any]

abstract validate_core(stac_dict: dict[str, Any], stac_object_type: STACObjectType, stac_version: str, href: str | None = None) → Any

Validate a core stac object.

Return value can be None or specific to the implementation.

Parameters:

• stac_dict – Dictionary that is the STAC json of the object.

• stac_object_type – The stac object type of the object encoded in stac_dict. One of STACObjectType.

• stac_version – The version of STAC to validate the object against.

• href – Optional HREF of the STAC object being validated.

abstract validate_extension(stac_dict: dict[str, Any], stac_object_type: STACObjectType, stac_version: str, extension_id: str, href: str | None = None) → Any

Validate an extension stac object.

Return value can be None or specific to the implementation.

Parameters:

• stac_dict – Dictionary that is the STAC json of the object.

• stac_object_type – The stac object type of the object encoded in stac_dict. One of STACObjectType.

• stac_version – The version of STAC to validate the object against.

• extension_id – The extension ID of the extension to validate against.

• href – Optional HREF of the STAC object being validated.