Last updated at 1:14 pm UTC on 5 September 2017
Also contains Pier2, Pier3 and Pillar.
In Pier everything is a PRStructure object.
"A abstract structure represents the model of a single page. It has got a title and a name. The name must be unique within the scope of the parent. A structure is identified with a path of structure names."
A pier is a raised walkway over water, supported by widely-
spread pillars. Today the most common form of a pier is the
industrial pier which can be found at ports throughout the world.
A pier may be open air or closed. Sometimes a pier has two
— Wikipedia, http://en.wikipedia.org/wiki/Pier
Source: page 21 of Magritte