@font-face At-Rule

Oxygen XML Editor plugin allows you to use custom fonts in the Author mode by specifying them in the CSS using the @font-face media type. Only the src and font-family CSS properties can be used for this media type.

@font-face{
    font-family:"Baroque Script";
    /*The location of the loaded TTF font must be relative to the CSS*/
    src:url("BaroqueScript.ttf");
}

The specified font-family must match the name of the font declared in the .ttf file.