CDF Changes Log, CDF V3.1 V2.0.0 11-Feb-91 Release of CDF V2.0. V2.1.0 7-Jun-91 Release of CDF V2.1. V2.2.0 20-May-92 Release of CDF V2.2. V2.3.0 1-Oct-92 Release of CDF V2.3. V2.4.0 26-Jan-94 Release of CDF V2.4. V2.5.0 21-Dec-94 Release of CDF V2.5. V2.6.0* 23-Feb-96 Alpha release of CDF V2.6. V2.6.0# 5-Apr-96 Beta release of CDF V2.6. V2.6.0& 13-Jun-96 Beta release of CDF V2.6. V2.6.0$ 17-Jun-96 Beta release of CDF V2.6. V2.6.0@ 15-Aug-96 Beta release of CDF V2.6. V2.6.0 10-Oct-96 Release of CDF V2.6. V2.7.0 27-Sep-99 Release of CDF V2.7. V2.7.1 16-May-01 Add new ports: Solaris on PC, MacOS X and Linux on DEC/Alpha. Correct bugs in CDFDump program. Correct and enhance CDF-Java APIs and Java Native Interface (JNI). Add new Java-based tool programs for CDFEdit and CDFExport. Add variable name checking in CDFconvert for compression option. Add Cygwin port for win32 on PC. Create individual tool programs for Windows using Cygwin libraries. 05-Dec-01 Add a new set of APIs: CDFgetrVarsRecordData, CDFgetzVarsRecordData, CDFputrVarsRecordData and CDFputzVarsRecordData to allow a full single record read/write for a group of r/zVariables. 26-Jan-02 Correct a bug in cdfcmp.c for showing dimension size differences between two zVariables. 28-Jun-02 Add a new option in cdfcmp.c to allow tolerance checks while comparing two unequal data values. 22-Jul-02 Handle f77 Fortran for Cygwin. 25-Nov-02 Add 64-bit mode for Solaris/sparc64 for sparcv9. Also, gcc for 64-bit is added. V2.7.2 08-Apr-04 Change the way that current variable select is being handled. Keep the current variable selected offset as a reference for any following variable selection. Originally, each time a selection of a variable or getting a variable's field data will start the search for that variable ALWAYS from the beginning of the variable list. It requires too many I/Os for accessing a sequence of variables. 04-May-04 Corrected a bug that caused the f77 to fail under 64-bit environment. V3.0 07-Jan-05 Changed file offset from type long (32-bit) to off_t (64-bit) for the platform on which the data type is supported. Changed the file I/O functions accordingly. The CDF internal file structures are changed. Made the library backward compatible, meaning programs created from V3.0 can still access (read/update) the CDF files of older version. Expanded the length of variable and attribute name from 64 to 256. The CDF/Java was modified to ensure that concurrent accessing a CDF would be thread-safe. Added a new data type, CDF_EPOCH16, to accommodate more refined time resolution within a second. A new set of functions, similar to those of CDF_EPOCH data type, was added. Modified cdfdump tool program to be more efficient in data reading. 25-Mar-05 Changed JNI and Java-CDF APIs to ensure proper operations within the multiple-threaded environment. V3.1.0 27-May-05 Added new sets of APIs to allow Standard Interface to interact with zVariables and other CDF-related information. 11-Jul-05 Added MingW port for PC. 05-Aug-05 Added new functions to allow creating CDF files in older, V2.7, version, not just the default V3.1. 18-Jan-06 Modified code, including tools, to handle file path that has ".cdf" or ".skt" extension while it is not expected to be there. 30-Jan-06 Add FreeBSD port for PCs. 1-Feb-06 Added Intel C++ and Fortran compilers for Linux port on PCs. 22-Jun-06 Added support for HPUX and AIX for both 32 and 64-bit mode. Allow Mac OS X to build code for PPC and x386. V3.1.1 12-Oct-06 Modified to allow upper/lower case CDF name for Windows. Changed Epoch to make 9999-12-31 23:59:999 as encoded date for the filled value of -1.0E31. For Epoch16, a pair of -1.0E31 filled values is encoded as 9999-12-31 23:59:999:999:999:999.