According to Ranganathan,“A subject bibliography is a document
bibliography confined to a specific subject field only, instead of covering the entire universe of subjects.”.
The pillars have the top and bottom sadurams and intervening kattu, while the pilasters are uniformly four- sided as in Mahendravarman' s cave-
temples except that in the Singavaram Ranganathan cave- temple the pilasters like the pillars are demarcated and have
lotus medallions on the saduram faces.
All these cave- temples have only two pillars and two pilasters on the mandapa facade, and a similar set behind, inside the mandapa
wherever there is such a demarcation of ardha- and mukha- mandapas, as in the Ranganathan cave- temple, the Orukkal mandapam, and Dharmaraja mandapam.