Table 4.

Properties of acronym map, general map and regional map.

acronym map (AM)	general map (GM)	regional map (RM)
AM contains algorithmically created BrainSites (see figure 2). No changes are possible for the data collator	the BrainSites in GM are predefined (see table 3). Extensions and changes are possible if consensus is reached	the RM BrainSites are broadly topographically defined (see figure 3). Changes depend on further insights
AM includes one BrainSite for each acronym that is used by at least two original BrainSites	GM offers standardized BrainSites for certain regions of the brain only	RM provides a species-independent topographic/functional parcellation of the entire cerebral cortex
the BrainSites of AM have no pre-defined hierarchical relations specified by the data collators	the BrainSites of GM are defined according to a predefined hierarchy	RM constitutes a full cortical map of contiguous BrainSites
in AM, BrainSites can refer to equivalent brain structures (e.g. AM-Caud, AM-Cd, AM-C#3, AM-CA#1 all refer to the caudate nucleus)	in GM, there is no semantic overlap between its elements except for hierarchical relations (e.g. there is only one BrainSite in GM referring to the caudate nucleus as an entity)	in RM, overlaps and gaps are excluded. Semantic overlap through external relations can occur at the borders
neither intrinsic nor external relations of AM need to be specified by the data collator. Instead, they are generated algorithmically	both internal and external relations of GM must be specified by the data collator	only external relations of RM occur and must be specified by the data collator