To map additional format component names to existing format component definitions (for example):
[FormatAliases]
; format component name = another format component name
DividerBorder = ThickBorder
You can use this section to specify properties for the format component named on the left as though [FirstSubformat]based=SecondSubformat (see §7.4.5 Basing format properties on other formats). Make sure that SecondSubformat is defined somewhere in the format component template chain.
When DITA2Go looks up format component definitions, DITA2Go replaces each format component name listed on the left with the name assigned to it on the right. This process is not recursive; if you assign format component names a=b and b=c, when DITA2Go needs a definition for a, instead DITA2Go looks for a definition of b, not c.