def METHOD_NAME(resource_group_name: Optional[str] = None,
                      schema_id: Optional[str] = None,
                      service_name: Optional[str] = None,
                      opts: Optional[pulumi.InvokeOptions] = None) -> AwaitableGetGlobalSchemaResult:
    """
    Gets the details of the Schema specified by its identifier.
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str schema_id: Schema id identifier. Must be unique in the current API Management service instance.
    :param str service_name: The name of the API Management service.
    """
    __args__ = dict()
    __args__['resourceGroupName'] = resource_group_name
    __args__['schemaId'] = schema_id
    __args__['serviceName'] = service_name
    opts = pulumi.InvokeOptions.merge(_utilities.get_invoke_opts_defaults(), opts)
    __ret__ = pulumi.runtime.invoke('azure-native:apimanagement/v20230301preview:getGlobalSchema', __args__, opts=opts, typ=GetGlobalSchemaResult).value
    return AwaitableGetGlobalSchemaResult(
        description=pulumi.get(__ret__, 'description'),
        id=pulumi.get(__ret__, 'id'),
        name=pulumi.get(__ret__, 'name'),
        schema_type=pulumi.get(__ret__, 'schema_type'),
        type=pulumi.get(__ret__, 'type'),
        value=pulumi.get(__ret__, 'value'))