Historiographus distinguishes the actual content of documents from its tangible forms and the bibliographic citations used to reference them. While the former are stored in the main namespace, Historiographus uses the special namespace Citation (abbreviated Cit) for citations.
General document pages are linked with citation pages with the pair "Has citation" / "Is citation of" of iverse properties.
Citation pages use special templates adapted from Wikipedia citation templates to produce formated references (see the citation page PORTER2001).
These bibliographic citations have Z3988 metadata embedded in HTML (OpenURL COinS - Context Objects in Spans) and may be automatically retrieved by COinS aware software like the Zotero extension for the Mozilla Firefox browser, developed by the Center for History and New Media at George Mason University.