Portal Content Directory (PCD)
The Portal Content Directory (PCD) is a software layer for accessing the information about portal objects. The information is stored in the portal database.
The PCD stores portal objects as a set of trees of nodes. The main top-level node is called portal_content, whose tree contains nodes for iView, page, workset, role and other semantic objects. The tree can also contain folder nodes.

For more information, see the PCD central note 715309 (NetWeaver 2004) or 588904 (EP 6.0).