Re: XPath expression evaluation question

[<aq...@da...>]

Tony,
This sounds extremly cool... I have been dreaming about this kind of 
feature...
Please keep us updated.
Anup

---------Included Message----------
>Date: Sun, 21 Jul 2002 10:50:01 -0700
>From: "Ovidiu Predescu" <ov...@ap...>
>Reply-To: "Ovidiu Predescu" <ov...@ap...>
>To: <A.M...@sa...>, 
<xsl...@li...>
>Subject: Re: XPath expression evaluation question
>
>Tony,
>
>On 7/21/02 7:54 AM, "A.M...@sa..." 
<A.M...@sa...>
>wrote:
>
>> 
>> I have been doing some development on xslt-process, and am about to 
start
>work
>> on adding XPath expression evaluation to the debugger using Saxon. 
Given the
>> Saxon code, I hope the actual evaluation may not be too complex. What 
is far
>> from clear to me is the best way of displaying the output of an 
evaluation
>to
>> the user. If the result is a simple value, it will be easy. However, 
if the
>> result is a node set we need a good way of identifying the nodes 
within the
>> source tree which have been selected. Possibilities that have 
occurred to me
>> (I don't know how easy they would be to program, though) are
>> 1. Use the speedbar in some way to display a tree which can be 
expanded and
>> contracted 
>> 2. Use the source code in the buffer, and highlight the nodes somehow 
-
>colour
>> would be the obvious choice
>> 3. Number the nodes hierarchically and display a list of the numbers 
of the
>> selected nodes 
>> 
>> Does anyone have any other ideas, or views on a suitable way of 
displaying
>the
>> evaluated expression.
>
>I think a combination of 1) and 2) would be an interesting option. The
>result would appear in the speedbar as a tree. When the user clicks on 
a
>particular node in the tree, the corresponding elements in the source
>document can be displayed, perhaps in a different color.
>
>One problem with this approach is that you'll need to write code to 
analyze
>the source XML and annotate it with Xpath information, so that 
selecting
>elements could work fast. I believe this is where the bulk of the code 
for
>this approach would be.
>
>Regards,
>Ovidiu
>
>
>
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