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From Ralph Goers <>
Subject Re: Default Expression Language
Date Sun, 19 Aug 2007 20:33:45 GMT
For 2.2 I suggest that what we recommend should be the default. However, 
it should clearly be documented how to reconfigure to match 2.1.  As far 
as which one to choose, I would look at:
1. Compatible license
2. Documentation
3. Performance
4. Ease of integration. (i.e. doesn't have to be ripped from some other 
jar, doesn't have a lot of dependencies we don't already have, etc.)


Daniel Fagerstrom wrote:
> Thanks to Grzegorz efforts, we are now close to be able to use the 
> same exprssion language and object model both in the sitemap and in 
> templates.
> The whole thing is plugable, so those who have large investments in 
> the current syntax and models can continue using them.
> But while flexibillity is good for back compability it is confusing 
> for new users. So we should try hard to decide what should be the 
> default expression language and expression syntax.
> Once I preffered JXPath as my webapps where XML-centric and I used 
> XSLT and XPath everywhere. But now my webapps is more Java based, so 
> JEXL or JS seem more natural. Of these I prefer JEXL as JS is a little 
> bit to powerful as an EL for my taste.
> But is the rest of world really using JEXL, JS or JXPath as ELs? 
> Wouldn't it be a better idea to use the Unified Expression Language 
> (EL) of JSP 2.1 (JSR-245) 
> ( To me it 
> seem like a rather good EL and there are several Apache licenced 
> implementations, Tomcat has one and there is another one called JUEL 
> /Daniel

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