Since the last paragraph displays an increasing use of acronyms as well as the idea of several standards working in concert, it might be helpful to take a step back and consider how the landscape of standards can be categorized. The following taxonomy of standards is in large parts derived from the Descriptive Metadata Guidelines for RLG Cultural Materials (RLG, 2005). To illustrate the different terms and their relationship, these guidelines use a metaphor that likens a record to a case of bottles being labeled, filled, stored, and delivered.