feature_default.xml

<?xml  version="1.0" encoding="UTF-8" ?>
<!-- It can be added for each operators like below form

<ABC>                       -> sales code
<sapient>true</sapient>         -> feature1
<burton>false</burton>          -> feature2
<libtech>true</libtech>         -> feature3
.
.
</ABC>

each name of tags are will be environment variable with ro.csc.
ex) ro.csc.sapient, ro.csc.burton, ro.csc.libtech <== you could use them at any section.
also, should be added between <FeatureSet>
 and </FeatureSet> .
[email protected]  -->
<SamsungMobileFeature>

<Country></Country>
<CountryISO></CountryISO>
<SalesCode></SalesCode>

<!-- Default Values -->
<FeatureSet>
</FeatureSet>

</SamsungMobileFeature>