How to get related facets using Solr query ?

[Shamik Bandopadhyay]

Hi,

   I've trying construct a facet query to organize related facets in the
response. Let me illustrate a sample. Let's say I've the following
documents indexed in Solr.

1. Doc A -->
                  Facet:AB
                  Facet:MNO

2. Doc B -->
                  Facet:CD
                  Facet:XYZ

3. Doc C --> Facet:AB,CD
                   Facet:IJK, XYZ


Now, I want the result organized as :

AB
    MNO,XYZ
CD
    IJK,XYZ

Is there a way to do this ?

Thanks,
Shamik