First drop of package_definition, obtained from the system model used in the platform build, along with a generic SystemBuild fragment (from TB91sf)
<?xml version="1.0"?>
<!DOCTYPE SystemDefinition SYSTEM "sysdef_1_4_0.dtd"
[ <!ENTITY layer_real_source_path "sf/app/webuis" > ]>
<SystemDefinition name="webuis" schema="1.4.0">
<systemModel>
<layer name="app_layer">
<module name="webuis">
<unit unitID="browsing_domain.webuis" mrp="" bldFile="&layer_real_source_path;/group" name="webuis"/>
</module>
</layer>
</systemModel>
</SystemDefinition>