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 identifier, the attribute will be attached to that file’s root group.
const char *attr_name
IN: Name of attribute to create
IN: Identifier of datatype for attribute
IN: Identifier of dataspace for attribute
IN: Identifier of creation property list (Currently not used; specify H5P_DEFAULT)
H5A_CREATE1 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 H5A_DELETE then recreate the attribute with H5A_CREATE1.
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.
Returns an attribute identifier if successful; otherwise returns a negative value.
The function H5Acreate renamed to H5Acreate1 and deprecated in this release.