Custom XKB mappings without modifying stuff in /usr/share

[nhaggin]

Greetings, all. Apologies if what I ask is available in The Fine Manual; some furious searching hasn't given me a yes or a no.

I'm working on some classical Latin, and I need to be able to type vowels with macrons. Using the Compose key, I can produce ē, ī, and ū, but the equivalent key sequence for a and o (Compose + hyphen + {a | o}) gives me a tilde instead of a macron above the vowel. Is there a way I can tell X to produce macrons instead of tildes in that case using a config file in my home directory? (For instance, is there a way to indicate such in my .xmodmap? The documentation for xmodmap has not been of any help thus far.)
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Nick

A.M.D.G.

[wynn]

I have found http://documentation.openoffice.org/HOW_TO/various_topics/Howto_special_char.pdf very useful, it not only goes into xmodmap but "Setting up deadkeys in XF86Config" (which can be used in xorg.conf as well).

[nhaggin]

That did the trick. Thanks a mil.
_________________
Nick

A.M.D.G.

[wynn]

The invoice is in the post