gedit/gtksourceview trouble making new language-spec

[Ed Greenberg <edg greenberg org>]

Hi Folks,  Trying to make a new language definition for gedit 
(gtksourceview), I seem to be stuck.

I'd like to highlight a c-like language called "Asterisk Extension 
Language."

I started by making a copy of the language-specs/c.lang file in my 
~/.local/share/gtksourceview-2.0/language-specs directory, called ael.lang.

<language id="ael" _name="ael" version="0.1" _section="Sources">
<metadata>
<property name="mimetypes">text/x-ael</property>
<property name="globs">*.ael</property>
<property name="line-comment-start">//</property>
<property name="block-comment-start">/*</property>
<property name="block-comment-end">*/</property>
</metadata>
----snip---


I created a mime-type definition for ael files called text-x-ael.xml in 
~/.local/share/mime/packages, containing this:

<?xml version="1.0" encoding="UTF-8"?>
<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info";>
<mime-type type="text/x-ael">
<sub-class-of type="text/plain"/>
<comment>AEL Source Code</comment>
<glob pattern="*.ael"/>
</mime-type>
</mime-info>


I ran update-mime-types ~/.local/share/mime


Stracing the gedit I find that I'm successfully opening both the 
ael.lang, and the text/ael-x-ael.xml:

$ grep ael strace.txt
open("/home/edg/.local/share/gtksourceview-2.0/language-specs/ael.lang", 
O_RDONLY) = 18
open("/home/edg/.local/share/mime/text/x-ael.xml", O_RDONLY|O_LARGEFILE) 
= 26
$
Needless to say, I don't get any highlighting when I run gedit, or I 
wouldn't be writing this message.

System is Ubuntu Lucid.

Given that I have both of these files being opened by gedit, I wonder 
what I might have done wrong. Any assistance will certainly be appreciated.

Best,
Ed Greenberg
Austin, Texas