H5D_OPEN2 opens the existing dataset specified by a location identifier and name,
loc_id may be a file, group, dataset, named datatype or attribute. If an attribute, dataset, or named datatype is specified for
loc_id then the dataset will be opened at the location where the attribute, dataset, or named datatype is attached.
The dataset access property list,
dapl_id, provides information regarding access to the dataset.
To conserve and release resources, the dataset should be closed when access is no longer required.