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# 1.5. Creating New Phrase Styles

## 1.5.1. Using Event Processing

SDF's event processing feature makes it easy to create a new phrase style from an existing one. For example, the following line makes LIB an alias of the S style:

    !on phrase 'LIB';; $style='S'

## 1.5.2. Using Mapping Tables

SDF uses the phrasestyles filter to define the mapping between an SDF phrase style and a target phrase style. For example:

    !block phrasestyles
    Name    To

    # Emphasis
    A       Default
    B       Bold
    I       Italic
    N       Normal
    U       Underline
    E       Filename
    JUMP    Jump
    1       =I
    2       =B
    3       =U
    S       =2
    SUB     Subscript
    SUP     Superscript
    !endblock

## 1.5.3. Creating New Target Phrase Styles

SDF makes it easy to define new target phrase styles by inheriting configuration details from an existing style.

See the `look/simple/mif.sdn` file in the SDF distribution for examples.