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                          Newsletter #50
                         February 22, 2000


CONTENTS
                                            *******************************
. VisAD HDF-5 Data Adapter                  * Visit the HDF home page     *
                                            * for up-to-date information  *
. JHI5 version 1.1 for HDF5-1.2.1           *                             *
                                            *  http://hdf.ncsa.uiuc.edu/  *
. Pre-compiled binaries for HDF5-1.2.1      *******************************

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

VisAD HDF-5 Data Adapter
========================

The VisAD HDF-5 Data Adapter is now available. It enables VisAD applications 
to read data from HDF5 files.  

VisAD (from the University of Wisconsin-Madison) is a Java toolkit for 
constructing interactive and collaborative visualization and analysis of 
numerical data. 

The VisAD HDF-5 Data Adapter consists of Java classes which call the NCSA 
Java HDF-5 Interface (JHI5), which calls the native HDF5 library.  It 
follows the VisAD standard interface, so it can be used by any VisAD 
application. 

For further details, see:

    http://hdf.ncsa.uiuc.edu/java-hdf5-html/VisAD_HDF5_DataAdapter/ 



JHI5 version 1.1 for HDF5-1.2.1
===============================

The Java HDF5 Interface (JHI5) version 1.1 for HDF5-1.2.1 is now 
available. 

JHI5 version 1.1 is a bug fix release.  The changes in JHI5 1.1 are:

  1. H5.H5Sselect_elements() -- The arguments were incorrectly passed from 
                                Java to C. This is fixed. 

  2. Object references and region references did not work correctly. 

     - The class HDF5Reference was eliminated. All object references should 
       be passed as Java byte[], length 8 (object reference) or 12 (region 
       reference). 

     - All H5R* interfaces changed to use byte[] instead of HDF5Reference. 
    
     - Region references are implemented and work correctly. 

  3. The Unix Makefile built the class HDF5CDataTypes, but failed to include 
     it in 'jhdf5.jar' when running 'make install'. This is fixed. 


See the Java-HDF5 Home Page for futher details:

   http://hdf.ncsa.uiuc.edu/java-hdf5-html/



Pre-compiled binaries for HDF5-1.2.1
====================================

HDF5-1.2.1 was released in December, 1999.  However, at that time only
the source code was available and not the pre-compiled binaries for
the platforms tested.

The pre-compiled binaries can now be downloaded from:

   ftp://ftp.ncsa.uiuc.edu/HDF/HDF5/current/bin/

The HDF5 Home page is at:

   http://hdf.ncsa.uiuc.edu/HDF5/

For information on the changes in HDF5-1.2.1 see Newsletter 49:

   http://hdf.ncsa.uiuc.edu/newsletters/newsletter49.html


--------------------------------------------------------------
For questions regarding these or other HDF issues, contact:

   hdfhelp@ncsa.uiuc.edu