diff options
Diffstat (limited to 'pkg/tbtables/doc/versions.doc')
| -rw-r--r-- | pkg/tbtables/doc/versions.doc | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/pkg/tbtables/doc/versions.doc b/pkg/tbtables/doc/versions.doc new file mode 100644 index 00000000..256d8886 --- /dev/null +++ b/pkg/tbtables/doc/versions.doc @@ -0,0 +1,29 @@ + 1999 August 17 + +This file describes changes in the STSDAS table format for the various +software versions, from 0 to 3. For an STSDAS table, the software version +number can be found in the size-information record; see fileformat.doc. + +version = 0 (before stsdas and tables package version 1.3): +This is the original version. Data types supported were single and double +precision real, integer, logical, and character strings. Each table element +was a multiple of four bytes in length (i.e. the size of single precision +real, integer, or logical). The row length was also a multiple of four +bytes. Data type short (integer*2) was not supported. + +version = 1 (1993 May 5, tables package version 1.3): +Data type short is supported, and the length of a character string is rounded +up to a multiple of two instead of four. The row length (used or allocated) +can be an odd multiple of SZ_CHAR (i.e. a multiple of two bytes instead of +four bytes). + +version = 2 (1995 Oct 11, tables package version 1.3.4): +Header parameters can have associated comments. The value of a header +parameter that is of type text may optionally be enclosed in single quotes; +this is to allow a comment following the value. Header parameters with +keyword HISTORY, COMMENT or blank are not in quotes and may not have comments. + +version = 3 (1998 Apr 14, tables package version 2.0.2): +The character strings in column definitions can have one more character +than before. This was done by not including the end-of-string character if +the string fills the available space. |