Setting properties outside of a build file

[piampri]

Hello,

Here's a fragment of the beginning of a build file which I have been looking at and can't seem to figure out :

<project name="Self" basedir="." default="build">
<!-- ANT tasks -->
<property name="propertyFile" value="${basedir}/${properties}"/>
<property file="${propertyFile}"/>


Now my question is, it appears as though the "properties" value has been set already. Where would it have been set. Is this possible ?