org = dependency.getScope();
                val = interpolate(org);
                if (org != val) {
                    dependency.setScope(val);
                }
                // SystemPath
                org = dependency.getSystemPath();
                val = interpolate(org);
                if (org != val) {
                    dependency.setSystemPath(val);
                }

        if (src != null) {
            if (sourceDominant || target.getSystemPath() == null) {
                target.setSystemPath(src);
                target.setLocation("systemPath", source.getLocation("systemPath"));
            }
        }
    }

    protected void mergeDependency_Optional(
            Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {

            | TODO: how can we document it?
            |-->
          <!-- defaultValue>compile</defaultValue -->
        </field>
        <field>
          <name>systemPath</name>
          <version>4.0.0+</version>
          <description>
            <![CDATA[
            FOR SYSTEM SCOPE ONLY. Note that use of this property is <b>discouraged</b>