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<SADEFSET/>
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The DEFSET tag is used to set a variable to a value, if a value has not already been associated
with it. The tag is the short form of:
<SAIF COND=!IsDefined(var)>
<SASET NAME=var VALUE=value>
</SAIF>
If the variable already has a value (not an empty string), the variable will remain unchanged.
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Attributes:
| NAME | variable name |
| VALUE | variable or expression |
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The following is an example of DEFSET;
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<!--- Will create 'var' with the below value --->
<SADEFSET NAME=var VALUE="var will now be this string">
<SASET NAME=var2 VALUE="var2 value">
<!--- Won't do anything since var2 has a value --->
<SADEFSET NAME=var2 VALUE="var2 will not be this string">
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