Proposed

Set variables from a Java properties file.

document attribute

Either name or document is required. Name of Java properties file.

 ----- demo.properties -----
 item1=value1
 item2=value2
 item3=value3

 ----- spc.xvcl -----
 <?xml version="1.0"?>
 <!DOCTYPE x-frame SYSTEM "default">
 <x-frame name="spc" outdir="build" outfile="spc.txt">
 <property document="demo.properties"/>
 </x-frame>

Result:

 <set var="item1" value="value1"/>
 <set var="item2" value="value2"/>
 <set var="item3" value="value3"/>

prefix attribute

Optional. When used, a prefix is prepended to the name of every variable.

With a prefix:

 <property document="demo.properties" prefix="demo"/>

Result:

 <set var="demo.item1" value="value1"/>
 <set var="demo.item2" value="value2"/>
 <set var="demo.item3" value="value3"/>

defer-evaluation attribute

Optional, When "yes", the defer-evaluation attribute is set for all variables.

With defer-evaluation="yes":

 <property document="demo.properties" defer-evaluation="yes"/>

Result:

 <set var="item1" value="value1" defer-evaluation="yes"/>
 <set var="item2" value="value2" defer-evaluation="yes"/>
 <set var="item3" value="value3" defer-evaluation="yes"/>