Definition of root map

[Jim Tivy <jimt@bluestream.com>]

Hi Folks

The term root map is used throughout the 1.3 DITA Spec.

However, its definition near the end of section 2.1.1 is bit terse given 
the number of times it is used in other places in the spec and given its 
importance to DITA processing.

Current definition says:

root map:
The DITA map that is provided as input for a processor.

Perhaps we could have something like this :)

root map:
The topmost DITA map in a map hierarchy used as input to a processor.  
This map hierarchy is often traversed by processors to enumerate topics 
and to, in turn, determine the context for each topic.  In this sense, a 
root map establishes the context of a topic.

cheers

Jim