Neuroscientist users see and exchange the instance documents representing
data and queries for data shown on the top layer, and groups develop
resource- and domain-specific data models. These are represented in the
grey layers, containing both highly specialized models (e.g., cortical and
thalamic anatomy, as shown) as well as more general structures that others
may make use of (layer beneath this, which may, for example, contain
structures for describing general anatomic structures such as 'brain
structure' or 'fiber connection'). These in turn are supported by more
generic libraries of definition components shown in brown.
The next two layers in orange are plumbing and utility constructs that
provide essentially an enhanced data type library over what XML schema
offers. In particular, fixed constructs are declared for defining
controlled vocabulary fields, units of measure, and structured numeric
data containers. This collection of types is termed BrainMetaL, as in
Finally, the bottom two layers represent the technology standards BrainML
is based on: XML, XLink, and XML Schema.