Data_flow_diagram

http://www.smartdraw.com/resources/tutorials/Introduction-to-DFD#/resources/tutorials/Data-Flow-Diagram-Layers

http://en.wikipedia.org/wiki/Data_flow_diagram

http://geekswithblogs.net/chrisfalter/archive/2008/03/25/value-of-domain-model.aspx

http://www.agilemodeling.com/artifacts/dataFlowDiagram.htm

http://www.getahead-direct.com/gwbadfd.htm

General Ledger Collection Data Diagrams
http://www.upenn.edu/computing/da/dw/genled/diagrams.html

http://www.lsuhsc.edu/ps/support/Version%208/Fin%208.8%20Manuals/General%20Ledger%20Training%20Guide.pdf

article uses a relational database schema diagram editor
http://www.eclipse.org/articles/Article-GEF-editor/gef-schema-editor.html