Here is the taxonomy I use for categorizing the EA artifacts we create. Comments?
Enterprise Architecture Taxonomy (Element-Domain-Component-Artifact)
The high level architectural description for Applications, Business, Business Continuity, Data, Infrastructure, Presentation and Security containing Architecture Domains. (i.e. An element contains domains)
The summary level of architecture describing the models used for each Architecture Element. (i.e. A domain contains components)
The detailed level of architecture describing the components of an Architecture Domain. (i.e. A component is represented by one or more artifacts)
The populated models representing the current and target architecture for Architecture Components.