Sample HDF5 Content

HDF5.js

// Given below is a view of what the HDF5 files content can look like.  
// This information can be found by using the `H5DUMP` command.

// File Start
HDF5 "point/point.h5" {
GROUP "/" {
   GROUP "1" {
      ATTRIBUTE "total" {
         DATATYPE  H5T_STD_I32LE
         DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
         DATA {
         (0): 9600
         }
      }
      GROUP "ghost" {
      }
      GROUP "local" {
         DATASET "1" {
            DATATYPE  H5T_STD_I32LE
            DATASPACE  SIMPLE { ( 9 ) / ( 9 ) }
            DATA {
            (0): 160, 2, 320, 161, 162, 159, 3, 319, 163
            }
            ATTRIBUTE "val1" {
               DATATYPE  H5T_IEEE_F64LE
               DATASPACE  SIMPLE { ( 5 ) / ( 5 ) }
               DATA {
               (0): 1, -3e-09, 3.15512e-317, 6.95279e-310, 0.000388863
               }
            }
            ATTRIBUTE "val2" {
               DATATYPE  H5T_STD_I32LE
               DATASPACE  SIMPLE { ( 7 ) / ( 7 ) }
               DATA {
               (0): 1, 160, 2, 0, 1, 1, 9
               }
            }
         }
         DATASET "10" {
            //
            // Rest of the file contents
            //
// File End

HDF5Hierarchy.md

To access specific data in a HDF5 file, you need to open the enclosing attribute, dataset or group.
Groups can contain more groups or datasets and so on leading to a hierarchical structure for accessing the file data.

The sample HDF5 content shown before can then be downsized to just a relation between these attributes, datasets and groups. Simply locate the parameter you require and open it to access the data inside.

HDF5 "point/point.h5"
GROUP "/"
   GROUP "1"
      ATTRIBUTE "total"
      GROUP "ghost"
      GROUP "local"
         DATASET "1"
            ATTRIBUTE "val1"
            ATTRIBUTE "val2"
         DATASET "10" 
         
            #
            # Rest of the file contents
            #