[Laszlo-dev] [JIRA] Resolved: (LPP-4401) Namespace separators are not recognized in datapaths - updated

[Henry Minsky]

It's just stripping the namespace prefixes for back compatibility,
that's the way the system originally worked way back in LPS v 1. There
is an attribute of dataset called "nsprefix" which can be set to true
to preserve namespace prefixes. I would like to set it to true by
default, but have held off doing that just because there never seemed
a good time to do it. But I'd be all for changing the default.



On 8/7/07, Chris Helgeson <chelgeson at laszlosystems.com> wrote:
> Henry,
>
> Just curious how we decided that the right behavior was to strip the
> namespace identifiers? How do we handle the presence of e.g. geo:long and
> precision:long in the same XML document? If we left the namespace
> identifiers they could be disambiguated...
>
>
> - Chris
>
>
> On Aug 7, 2007, at 2:05 PM, Henry Minsky (JIRA) wrote:
>
>      [
> http://www.openlaszlo.org/jira/browse/LPP-4401?page=all ]
>
> Henry Minsky resolved LPP-4401.
> -------------------------------
>
>     Fixed in Change#: 5956
>           Resolution: Fixed
>
> the fix implements the namespace prefix stripping in the lzXMLTranslator
> package
> for DHTML kernel.
>
>
>
>
> Namespace separators are not recognized in datapaths - updated
> --------------------------------------------------------------
>
>                 Key: LPP-4401
>                 URL:
> http://www.openlaszlo.org/jira/browse/LPP-4401
>             Project: OpenLaszlo
>          Issue Type: Bug
>          Components: LFC - Data
>    Affects Versions: 3.4.2, 4.0.3, 4.0.2
>         Environment: Macintosh referencing a yahoo rss data feed.
>            Reporter: Chris Helgeson
>         Assigned To: Henry Minsky
>            Priority: P1
>             Fix For: Legals
>
>
> When using a data source that uses namespace ":" separators in the tags, it
> is not possible to write an xpath expression that will bind to the element.
> It seems that the colon is not recognized.
> UPDATE: 8/6/07: Further research shows that the : separators for namespaces
> are stripped in the DOM representation of the XML file for SWF & DHTML when
> the XML is inline, but are not stripped in the DHTML version when loaded via
> HTML. The XPATH query works with : when the XML DOM keeps the :.
> To Reproduce: NOTE that in this example the namespace is stripped regardless
> of swf vs. DHTML
> <canvas debug="true">
>   <dataset name="dset">
>         <rss version="2.0"
> xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0">
>         <channel>
>         <yweather:units temperature="F" distance="mi" pressure="in"
> speed="mph" />
>         </channel>
>         </rss>
>   </dataset>
>
>   <simplelayout axis="y"/>
>
>   <view id="myview" datapath="dset:/rss/channel/">
>     <simplelayout axis="y"/>
>     <view datapath="units">
>       <simplelayout axis="x"/>
>       <text datapath="@temperature"/>
>       <text datapath="@distance"/>
>       <text datapath="@pressure"/>
>       <text datapath="@speed"/>
>     </view>
>   </view>
> </canvas>
> To Reproduce: NOTE that in this example the namespace is stripped in swf vs.
> not stripped in DHTML so the lzx file needs a yweather:units to work in
> DHTML and needs just units for SWF...
> XML file "wdata.xml":
> <rss version="2.0"
> xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0">
>  <channel>
>  <yweather:units temperature="F" distance="mi" pressure="in" speed="mph" />
> </channel>
> </rss>
> LZX file:
> <canvas debug="true">
>   <dataset name="dset" request="true" type="http" src="wdata.xml"/>
>
>   <simplelayout axis="y"/>
>
>   <view id="myview" datapath="dset:/rss/channel/">
>     <simplelayout axis="y"/>
>     <view datapath="units">
>       <simplelayout axis="x"/>
>       <text datapath="@temperature"/>
>       <text datapath="@distance"/>
>       <text datapath="@pressure"/>
>       <text datapath="@speed"/>
>     </view>
>   </view>
> </canvas>
>
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-- 
Henry Minsky
Software Architect
hminsky at laszlosystems.com