[Xpath-ng] My favorite XPath language]

[Uche Ogbuji]

Me:

> Step processing in location paths happen to be the main area where sets are 
> more natural in my experience (because of their natural union semantics) and 
> where we temporarily move things to Python dicts for efficiency.

I want to clarify that just because sets fit the step processing puzzle piece 
better than lists (in my experience), doesn't mean I think we also need a core 
node set data type.  I see the fact that 4XPath truly shifts to set semantics 
for step processing as an implementation detail.  I do think that we should be 
careful to define operations such that implementations that make heavy use of 
true sets internally are minimally disadvantaged.  We should also consider 
having functions such as uniq() that provide bridges between list and set 
considerations.


-- 
Uche Ogbuji                                    Fourthought, Inc.
http://uche.ogbuji.net    http://4Suite.org    http://fourthought.com
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