You can use configuration markers and configuration-variable assignments to override
settings in [XrefStyles] and in the HTML [XrefStyleLinkSrc] section; see Table 33
A temporary override to a cross-reference format affects the next cross reference after the configuration marker.
A persistent override affects the next cross reference in the format named by the Key in [Section]Key=Value, and all subsequent instances in the same FrameMaker file, unless changed again by a later override.
Table 33