 NUCLEAR RESEARCH<img SRC="mx7_25.gif"  align=RIGHT></center>

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<h2>
  Introduction </h2></center>
It is possible to match user defined expressions with the USE_MACRO keyword.
The general input structure for a match command is the following:<br>

<pre>
MATCH,USE_MACRO;
... VARY statements ...
USE_MACRO, NAME=macro1;
     or
macro1: MACRO={ ... madx statements};
CONSTRAINT, expr=  "lhs1 < | = | > rhs1";
CONSTRAINT, expr=  "lhs2 < | = | > rhs2";
...  CONSTRAINT statements ...
MACRO 2 