Applescript, cross reference the same information across multiple scripts.

Use a script library and load it at runtime.

A script library is nothing more than a standard compiled AppleScript - it can be exactly as you've written above.

Then in your other scripts you load the library at runtime:

set myLib to load script file "path:to:your.scpt"

Now you can reference properties and handlers in your library by targeting it:

set brandGroup to myLib's brandTable

Here is an example that I've gotten to work.

My so called a.app.

on run
	set myApp to "/Applications/applescriptFiles/demo -- the best/b.app"
	-- some hocus pocus is nesessary to avoid applescript from change path.
	
	
	tell application myApp	
		launch
		stringSet("stringie set") -- this function is in the "b" app.
	end tell
end run

My so called "b.app".

(* 

save this as an application bundle 

invoked by a.app.  

twtwtw write in:
https://discussions.apple.com/thread/4917321?start=15&tstart=0

hocus-pocus: 
 
Give your script application a unique bundle id string (CFBundleIdentifier) 
and a unique bundle name (CFBundleName) too, to make life easier.  
You set those in the info.plist file.  Launch the script app once to register 
it with launch services, and system will be able to find it thereafter.

Example:
      <key>CFBundleIdentifier</key>
      <string>com.rccharles.b</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>b</string>
	
	I added the CFBundleIdentifier info above the CFBundleInfoDictionaryVersion line.
 I left the CFBundleInfoDictionaryVersion and CFBundleName as is.

	
	*)

property myVar : "initial value"

on run
	display dialog myVar
end run

on stringSet(inputVar)
	set myVar to inputVar
	display dialog "variable myVar is " & myVar
end stringSet