AIPS HELP file for OUTCLASS in 31DEC20
As of Sat Feb 22 16:13:20 2020
Type: Adverb (String*12)
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.
OUTCLASS is used to specify the "class" field for the
output data file from a verb or task. This adverb is
handled by AIPS tasks and verbs under special "wildcard"
rules. These rules determine how the default output class
is combined with the user-specified OUTCLASS to create the
class field actually used. Except for '*', '?', and
trailing blanks (when an * is present), all characters
specified in OUTCLASS are copied to the corresponding
character positions in the final class field. A '?' in
OUTCLASS causes the corresponding character in the default
class to be used. An '*' in OUTCLASS causes 0 or more
characters (as many as possible) from the default class to
be used beginning at the character position of the *. The
number of characters (excluding trailing blanks) which
follow the * in the user-specified OUTCLASS determine how
many characters may be used. For the examples, assume
that the default class is '123456'. Then, OUTCLASS = '*'
results in an actual class of '123456'. OUTCLASS =
'A?B*D' results is 'A2B45D' and OUTCLASS = '?? CAL'
results in '12 CAL'.
Null value: ' '
Taken as '*' and the "default" value for OUTCLASS is the
task name unless the Help file for the specific task or
verb states otherwise. If the first character in OUTCLASS
is a back slash ('_'), then the default is changed from
the task name to the actual INCLASS. The _ does not
appear in the final output class, but the remaining 5
letters (if any) in OUTCLASS are used as above (as if they
had been typed in character positions 1 - 5 of OUTCLASS).