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A filter controls how a block of text is interpreted. The text is usually delimited by block and endblock macros.
For example, tables are usually defined via the table filter:
!block table Option Description -h display help -o specify the output extension !endblock
The result is:
Option | Description |
-h | display help |
-o | specify the output extension |
Some of the commonly used filters are:
Filter | Description |
table | the lines are a table in SDF's TBL format |
example | the lines are example paragraphs |
title | used to build a title block for memos, faxes, etc. |
topics | include files as sub-topics |
appendix | replace H1 styles with A1, etc. |
plain | replace H1 styles with P1, etc. |
A complete list of the supported filters and their parameters is given in the SDF Reference manual.
Other macros also support filters. These include:
For example, the following line includes another SDF file and formats it as an appendix:
!include "tips.sdf"; appendix
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