AIPS HELP file for IN3CLASS in 31DEC18
As of Sat Aug 18 0:33:47 2018
Type: Adverb (String*6)
Use: Data files are stored in AIPS under logical names which
have 3 parts: a 12-character "name" field, a 6-character
"class" field, and a numeric "sequence number" field.
IN3CLASS is used to specify the "class" field for the 3rd
of the input data files used by a verb or task. This
adverb is handled by AIPS tasks and verbs under special
"wildcard" rules. These rules determine which test
strings (e.g. image names in the catalog) match the
user-specified string. Except for '*', '?', and trailing
blanks (when an * is present), all characters specified in
IN3CLASS must exactly match the corresponding characters
in the test string. A '?' in IN3CLASS matches any single
character in the test string. An '*' in IN3CLASS matches
0 or more characters in the test string. Thus, IN3CLASS
= '*' matches any test string. IN3CLASS = '??B*D' matches
'ASBD', 'XYBXDD', and 'A3B45D', but does not match 'ABCD',
'BCD', or 'XYBXDE'.
Null value: ' '
Taken as '*' unless the Help file for the specific task
or verb states otherwise.