Re: [ACTION-153] related to [ISSUE-15] targetPointer

Yves

What do relative XPath expressions give you that absolute ones do not? Is 
relative purely to simplify the expressions themselves? Does XPath 
normally prohibit relative expressions?

<quote>
<its:targetPointerRule "//license[@xml:lang=$SourceLang]" 
targetPointer="../license[@xml:lang=$Target]"/>

<its:targetPointerRule "//src" 
targetPointer="../targets/target[@langCode=$TargetCode]"/>
</quote>

Do "//license[@xml:lang=$SourceLang]" and "//src" not need an attribute 
name?

Phil.





From:   Yves Savourel <ysavourel@enlaso.com>
To:     <public-multilingualweb-lt@w3.org>, 
Date:   09/07/2012 16:21
Subject:        [ACTION-153] related to [ISSUE-15] targetPointer



Hi all,

I have the action item to summarize the status of the targetPointer 
requirements
This related to ISSUE-15.

The current requirement (
http://www.w3.org/International/multilingualweb/lt/wiki/Requirements#targetPointer
) outlines several use cases.

I think the current status is:

- There is 3 intended implementations.

- It seems all questions about the reasons to have such feature have been 
answered in Dublin.

- The exact scope and model of the data category needs to be finalized.

So here is more thoughts to try to make this progress:

First, like for idValue, I believe now that this should be its own data 
category rather than an addition to the Translate data category: the 
feature should be available without using Translate.

As far as how to indicate the target, I think there is a distinction of 
what can be achieved depending on the way we set this up:

Shaun was illustrating his thoughts with:

 selector="//license[@xml:lang='en']" repeatable="yes"

To describe a case like this:

<application>
 <license xml:lang="en">
  <p>This is the license.</p>
  <p>It has multiple paragraphs.</p>
 </license>
 <license xml:lang="de">
  <p>Dies ist die Lizenz.</p>
  <p>Es verfügt über mehrere Absätze.</p>
 </license>
</application>

Such notation however:

 a) It would not work for cases where the target(s) are in non-sibling 
nodes.

 b) It would work only if the document uses xml:lang to distinguish the 
different language blocks (as it is the only implicit difference one can 
make in the example).

<application>
 <src>
  <license>
   <p>This is the license.</p>
   <p>It has multiple paragraphs.</p>
  </license>
 </src>
 <targets>
  <target langCode='1'>
   <license>
    <p>Dies ist die Lizenz.</p>
    <p>Es verfügt über mehrere Absätze.</p>
   </license>
  </target>
 </targets>
</application>

Or, more simply, for bilingual cases where the content is a single 
element:

<msgs>
 <m id='1'>
  <src>Text of the message</src>
  <trg>Texte du message</trg>
 </m>
</msgs>

So, I think an XPath relative expression would be more flexible because it 
would allow both use cases:

<its:targetPointerRule "//license[@xml:lang=$SourceLang]" 
targetPointer="../license[@xml:lang=$Target]"/>

<its:targetPointerRule "//src" 
targetPointer="../targets/target[@langCode=$TargetCode]"/>

However, this method has also a possible drawback: like with Shaun's 
example, with more complex expressions creating the target node if it does 
not exist, may be complicated. 

I wonder if then the data category scope could be limited to work, at 
least, with existing nodes?

Anyway, I hope you will have some additional ideas.
>From the experience we had with ITS 1.0 I know this is a feature that 
would be used.

-yves 




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