Military Communications and Information Technology: A Trusted ...

Chapter 3: Information Technology for Interoperability and Decision...
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#process_move
{
Call the Executive Control Subsystem
to process the move command
instructing the object to
move to the coordinates
;
}
#process_destroy
{
Call the Executive Control Subsystem
to process the destroy command
instructing the weapon system
to
destroy the target at the
coordinates ;
}
#process_unit
{
← unit recognized by the
lexical analyzer;
}
#process_weapon_system
{
← weapon system
recognized by the
lexical analyzer;
}
#process_coordinates
{
← coordinates
recognized by the lexical analyzer;
}
The common abstract syntax tree of the above mentioned language constructs
(i.e. independent of a concrete language representation) is depicted
in Fig. 4, the parse tree for the Language Representation 1 is in Fig. 5. In both
figures the flow of semantic attributes during semantic processing is depicted.
We would like to point out that the semantic information contained in the semantic
attributes (.object_type, .unit_type, .coordinates, etc.)
is in a unified (canonical) form regardless of the concrete language representation
used. To demonstrate the power of the presented language processing techniques
we intentionally used different formats of GPS coordinates and different order
of “weapon system” and “target” clauses in the individual language representations
in the examples of language constructs.