Last modified: 16 December 2010
Name: H5Acreate1
Signature:
hid_t H5Acreate1( hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id, hid_t acpl_id )

Purpose:
Creates a dataset as an attribute of another group, dataset, or named datatype.

Deprecated Function:
This function is deprecated in favor of the function H5Acreate2.

Description:
H5Acreate1 creates the attribute attr_name attached to the object specified with loc_id.

The attribute name specified in attr_name must be unique. Attempting to create an attribute with the same name as an already existing attribute will fail, leaving the pre-existing attribute in place. To overwrite an existing attribute with a new attribute of the same name, first call H5Adelete then recreate the attribute with H5Acreate1.

The datatype and dataspace identifiers of the attribute, type_id and space_id, respectively, are created with the H5T and H5S interfaces, respectively.

Currently only simple dataspaces are allowed for attribute dataspaces.

The attribute creation property list, acpl_id, is currently unused; it may be used in the future for optional attribute properties. At this time, H5P_DEFAULT is the only accepted value.

The attribute identifier returned from this function must be released with H5Aclose or resource leaks will develop.

Parameters:
hid_t loc_id IN: Identifier for the object to which the attribute is to be attached
May be any HDF5 object identifier (group, dataset, or committed datatype) or an HDF5 file identifier; if loc_id is a file identifer, the attribute will be attached to that file’s root group.
const char *attr_name     IN: Name of attribute to create
hid_t type_id IN: Identifier of datatype for attribute
hid_t space_id IN: Identifier of dataspace for attribute
hid_t acpl_id IN: Identifier of creation property list
(Currently not used; specify H5P_DEFAULT.)

Returns:
Returns an attribute identifier if successful; otherwise returns a negative value.

Fortran90 Interface:
See listing under H5Acreate.

History:
Release     C
1.8.0 The function H5Acreate renamed to H5Acreate1 and deprecated in this release.