For segment matching, specifies the list of segment values to use for segment matching.
You must specify one or more values (for a match column) that defines the segment matching. For example, for a given match rule, suppose you wanted to define segment matching by Gender. If you specified a segment match value of M (for male), then, for that match rule,
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searches for matches (based on the other match columns) only on male records—and can only match to other male records, unless you also enabled Segment Matches All Data.
Segment match values are case-sensitive. When using segment matching on fuzzy and exact base objects, the values that you set are case-sensitive when executing the Match batch job.