H5T_COMMIT_ANON commits a transient datatype (not immutable) to a file, turning it into a named datatype with the specified creation and property lists. With default property lists,
H5P_DEFAULT, H5T_COMMIT_ANON provides similar functionality to that of H5T_COMMIT, with the differences described below.
The datatype access property list identifier,
tapl_id, is provided for future functionality and is not used at this time. This parameter should always be passed as the value
Note that H5T_COMMIT_ANON does not link this newly-committed datatype into the file. After the H5T_COMMIT_ANON call, the datatype identifier
dtype_id must be linked into the HDF5 file structure with H5O_LINK or it will be deleted from the file when the file is closed.
The differences between this function and H5T_COMMIT are as follows:
- H5T_COMMIT_ANON explicitly includes property lists, which provides for greater control of the creation process and of the properties of the new named datatype. H5T_COMMIT always uses default properties.
H5T_COMMIT_ANON neither provides the new named datatype’s name nor links it into the HDF5 file structure; those actions must be performed separately through a call to H5O_LINK , which offers greater control over linking.
This function will not accept a datatype that cannot actually hold data. This currently includes compound datatypes with no fields and enumerated datatypes with no members.