def create_index(DirectoryArn=None, OrderedIndexedAttributeList=None,
    IsUnique=None, ParentReference=None, LinkName=None):
    """
    Creates an index object. See Indexing for more information.
    See also: AWS API Documentation
    
    
    :example: response = client.create_index(
        DirectoryArn='string',
        OrderedIndexedAttributeList=[
            {
                'SchemaArn': 'string',
                'FacetName': 'string',
                'Name': 'string'
            },
        ],
        IsUnique=True|False,
        ParentReference={
            'Selector': 'string'
        },
        LinkName='string'
    )
    
    
    :type DirectoryArn: string
    :param DirectoryArn: [REQUIRED]
            The ARN of the directory where the index should be created.
            

    :type OrderedIndexedAttributeList: list
    :param OrderedIndexedAttributeList: [REQUIRED]
            Specifies the attributes that should be indexed on. Currently only a single attribute is supported.
            (dict) --A unique identifier for an attribute.
            SchemaArn (string) -- [REQUIRED]The Amazon Resource Name (ARN) of the schema that contains the facet and attribute.
            FacetName (string) -- [REQUIRED]The name of the facet that the attribute exists within.
            Name (string) -- [REQUIRED]The name of the attribute.
            
            

    :type IsUnique: boolean
    :param IsUnique: [REQUIRED]
            Indicates whether the attribute that is being indexed has unique values or not.
            

    :type ParentReference: dict
    :param ParentReference: A reference to the parent object that contains the index object.
            Selector (string) --A path selector supports easy selection of an object by the parent/child links leading to it from the directory root. Use the link names from each parent/child link to construct the path. Path selectors start with a slash (/) and link names are separated by slashes. For more information about paths, see Accessing Objects . You can identify an object in one of the following ways:
            $ObjectIdentifier - An object identifier is an opaque string provided by Amazon Cloud Directory. When creating objects, the system will provide you with the identifier of the created object. An object s identifier is immutable and no two objects will ever share the same object identifier
            /some/path - Identifies the object based on path
            #SomeBatchReference - Identifies the object in a batch call
            

    :type LinkName: string
    :param LinkName: The name of the link between the parent object and the index object.

    :rtype: dict
    :return: {
        'ObjectIdentifier': 'string'
    }
    
    
    """
    pass
