SDF 2.000: SDF Reference: sdf Filter

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# 5.26. sdf Filter

## Interface

The general syntax is:

      !block sdf[; parameters]
      ...
      !endblock

See Understanding Filter Interfaces, if necessary.

## Description

The sdf filter can be used to apply an arbitrary set of paragraph and/or phrase attributes to a section of text.

## Examples

To add change bars to a section of text, the sdf filter can be used in combination with the changed attribute as follows:

    !block sdf; changed
    This text has been changed.

    And so has this.
    !endblock

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