I followed a link on a Linked In discussion group today, to the home page of the Universal Data Element Framework (UDEF), which is “a framework for describing data to enable interoperability”. It’s a great place to work with if you want to kick-start data modelling efforts. See their list of definitions and properties at http://www.opengroup.org/udef/htm/en_defs.htm.
If you’re looking for a list of data classes for your attribute naming standards, their properties (amount, identifier, text, value etc.) probably cover everything you need.