From: Bruce Miller <bruce miller nist gov>
To: Ming Chen <ciming chen yahoo com>
Cc: "xml gnome org" <xml gnome org>; Liam R E Quin <liam holoweb net>; "mhyang ustc edu" <mhyang ustc edu>
Sent: Friday, January 20, 2012 10:14 PM
Subject: Re: [xml] How could I understand the slightly difference of the parsing process of E1/E2[E3] and E1[E2][E3]?
On 01/20/2012 12:46 AM, Ming Chen wrote:
> Thank you Bruce,
> My colleague began to have some approval of dealing a step (regardless of how
> many predicates attached) as a whole, //rec/(para[1]). That is a big progress
> for me.
> We are following the XPath 2.0 spec. Are the both have the same behaviour about
> the parsing of steps with predicates?
Frankly, I haven't spent much time looking at the XPath 2
spec, since I would be wishing for features I can't use
in my current applications...
> While we still cannot reach an agreement about the DFS and BFS dispute. For
> example, step1/step2/step3/step4, assume that each has multiple matched nodes,
> should it be interpreted as step1/(step2/(step3/step4)) or
>
((step1/step2)/step3)/step4?
Either, depending on what you mean by the parentheses :>
You might try the XPath 1 spec as (possibly) being shorter
and easier to digest; especially section 2 about Location Paths:
"The initial sequence of steps selects a set of nodes
relative to a context node. Each node in that set
is used as a context node for the following step.
The sets of nodes identified by that step are unioned together."
Hope that helps;
bruce
>
