Code snippets - lets unite!!

As I was browsing for some help for doing a simpel task I came across a site which contains Snippets - http://snipplr.com. Wow! That sounded interesting - the snippet I first clicked on was: "Opacity Hack. I was a litle disapointed, not with the snippet in question, but the fact that it was nothing but simpel text...

For years in the back of my head I have had the thought that code snippets should unite! :-) My hopes that snipplr.com was such a united snippet spot was spoiled...

But I tried to write my POWs about snippets - which was not 100% allowed by their comment system, so here goes - a (hopefully) working copy of what I tried to write about snippets standardlization:

Hi, In general I like the Idea of snippets, no doubt about that! But I would love to see some kind of standardilzation of them, preferable in a combination of XML, XSD (schema). You could then transform your XML snippet to what ever purpose you would need it in - say a HTML context. You can validate the input to the snippet using XSD. And some clever programmer might create add-ins for say MS Visual Studio 2008 or other commenly used development tools.
Here is my first thoughts about how it could be put together - based on this snippet for opacity:

<?xml version="1.0" encoding="utf-8"?>
<snippets>
  <snippet>
    <name>Opacity hack</name>
    <version>1.0</version>
    <context>CSS</context>
    <template>
      <outputRaw><![CDATA[selector {  filter: alpha(opacity=60); /* MSIE/PC */  -moz-opacity: 0.6; /* Mozilla 1.6 and older */  opacity: 0.6;}]]></outputRaw>
      <output>
        <input id="alpha" type="string" default=".selector" /> {
        filter: alpha(opacity=<input id="opacity" type="int" default="60"/>); /* MSIE/PC */
        -moz-opacity: <eval id="moz-opacity"><![CDATA[opacity/100]]></eval>; /* Mozilla 1.6 and older */
        opacity: <eval id="moz-opacity"><![CDATA[moz-opacity]]></eval>;
        }
      </output>
    </template>
  </snippet>
</snippets>