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Filters
If attribute 5 contains a number, this defines the maximum item size; the default
(used if attribute 5 is null) is approximately 30,000 bytes. If the data exceeds this
maximum size, the excess data will be written to overflow items with an
incrementing suffix of .0001, .0002 etc. appended to the item-id.
Note:
The host can be configured so that WS-HOST can create items larger
than 30,000 bytes. Refer to Chapter 3 for details.
Alternatively, filter attribute 5 can contain one of the following option letters:
C
Specifies that the data is to be copied in compressed form for
subsequent downloading by HOST-WS using a similar C type
filter. Compressed mode is intended for temporary storage of
PC files on the host when no host access is required to those
files.
If the C option is specified, no other filter attributes are used.
D
Specifies that the data to be copied is in Reality format as
downloaded by HOST-WS using a similar D type filter. No
translation of characters is performed. Note that this option
allows more than one item to be created.
This feature allows data and programs to be moved between
host systems via PC disks and can prove useful for low-cost
distribution of programs and data files within multiple-host
organisations.
If the D option is specified, none of the other filter attributes
are used.
Attribute 6
Defines the action to be taken if the host item already exists. If this attribute
contains the letter O (for overwrite), the existing item is automatically
overwritten. If the attribute is null, you are prompted for permission to perform
the overwrite.
Attributes 7+
Contain the character translation attributes as described in the section on filter
items (page C-138).
Example
The following filter converts tabs into spaces, CR/LF pairs into attribute marks, and
discards DOS end-of-file and 0xFF characters:
001
002
003
004
005
006
007
008
009
010
011
C-140
FLT
DEFAULT INTERNAL WS-HOST FILTER
WSHWS
1
30000
09>20
0A>
0D>FE
1A>
FF>
V3.0