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#### A.8.4.1 Multiple Match Action Box

Multiple Match Action Box

The Multiple Match Action Box allows you to choose which rows appear in the output table following a successful multi-table match. For each input table you have two options to choose from:

Matched Rows Only
  Rows will appear in the output table only if they contain an entry from the table in question (but see below).
All Rows
  Rows will appear in the output table if they contain an entry from the table in question, regardless of constraints on other input tables (overrides the previous option).

At present the multi-table options available within TOPCAT are not so comprehensive as those provided by the corresponding STILTS command `tmatchn`. This may be improved in future.

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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@bristol.ac.uk