Resolution:
$AF_HOME/config/ConfigValues_AOPD.xml:
<ConfValue description="Include only the orderline for attribute based decomposition" name="ABDProductOrderline" propname="com.tibco.af.aopd.flags.includeonlyproductorderline" sinceVersion="2.0" visibility="Basic">
      <ConfBool default="false" value="false"/>
</ConfValue>

By default (false) all orderlines from the order will be considered to check against whom the Xpath should be executed. This means only data from orderlines which have products which are ancestors of the product for which decomposition takes place. See the attached example (Filename: Includeonlyproductorderline_false.pdf).

If includeonlyproductorderline=true, only the orderline from which the product is being decomposed is being considered. Other orderlines, even ancestors to the product, will not be considered in this case. See the attached example (Filename: Includeonlyproductorderline_true.pdf).

Include only the orderline for attribute based decomposition.

tib_af_user_guide.pdf (Attribute Based Decomposition)