Re: [wsbpel] Groups - New Action Item #0067 Change example XPathexpression ...

[Alex Yiu <alex.yiu@oracle.com>]

Hi Mark,

Thank you for bringing up this XPath detail. Now I understand what you are referring to now.

And, I agree with you generally speaking. Either "/*" or "/line" can be added to clarify and correct the second expression. I tend to prefer adding "/line" because this gives a better constrary with the first expression.

I would suggest to change the second expression from:

a collection of XML infoset items e.g. $myFooVar/lines 

to:

a collection of XML infoset items e.g. $myFooVar/lines/line 

One way or the other ( "/*" or "/line") please update the Action Item description. So the editor group would apply the change that you desire precisely.


Thanks!


Regards,
Alex Yiu


Mark Ford wrote:

The example Xpath expressions from those two lines are as follows:

.	a single XML infoset item: e.g. $myFooVar/lines/line[2] 
.	a collection of XML infoset items e.g. $myFooVar/lines 

After reading that, I imagine that the XML might look like this:

<var>
  <lines>
     <line>one</line> 
     <line>two</line> 
     <line>three</line> 
   </lines>
</var>

The first expression illustrates selecting a single infoset item, which
would result in the 2nd line element.

The second expression would select a single element, the lines element. This
element has multiple children, but it's still a single element. In order to
get multiple elements back from the expression you would have to select the
individual lines. This could be done a number of ways but I think
$myFooVar/lines/* is the clearest.

If I misread the above or if you feel strongly about keeping the current
example then I'll remove the action item since it's a minor thing and I
don't want to open debate on a section we already reviewed.

Thanks

-----Original Message-----
From: Alex Yiu [mailto:alex.yiu@oracle.com] 
Sent: Thursday, March 30, 2006 2:57 PM
To: mark.ford@active-endpoints.com
Cc: wsbpel@lists.oasis-open.org; Alex Yiu
Subject: Re: [wsbpel] Groups - New Action Item #0067 Change example XPath
expression ...


Hi Mark,

I am not sure I follow your suggestion/comment.
My expectation/interpretation is: "lines" is the parent element of multiple
"line" elements.


Regards,
Alex Yiu


mark.ford@active-endpoints.com wrote:

  

OASIS Web Services Business Process Execution Language (WSBPEL) TC member,

Mr Mark Ford has created a new action item.

Number: #0067
Description: Change example XPath expression ...
Owner: Unassigned


Comments:
Mr Mark Ford  2006-03-30 19:29 GMT
While the current example is valid XPath, it looks odd following the
    

example for selecting a single infoset item which is:
$myFooVar/lines/line[2]. The new example better illustrates that we're
expecting to get multiple "line" elements (and other children) while the
previous example would only return a collection if there were multiple
"lines" elements.
  

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