Hi Peter,

thanks for clarifying where those triples come from. I am curious what they are 
- could you drill down into the form (or triples) and send a screenshot of TBC 
with this data expanded? I have never tried to run inferences over a SWP/UISPIN 
model. Why do you actually do this? In my experience, it is better to keep the 
UISPIN triples in a separate file from the domain triples. Inferencing is 
typically only needed over the domain model.

Talking about how to minimize the impact of such situations, I could change the 
rendering of the error messages so that the resulting string cannot be parsed 
back. For example, I could render them like ui:systemProperty="{= Cannot render 
blank node }" which will make it impossible to accidentally assign those values 
and pollute the asserted model.

Thanks
Holger



On Mar 3, 2011, at 9:51 PM, Peter Ward wrote:

> Hello All
> 
> I'm trying to gather evidence, but as a "heads-up" in case this is a known 
> issue...
> 
> I have many fragments of UISPIN templates. Sometimes I get a rendering 
> exception - well, quite often as I develop these fragments.
> Only recently, has a strange behaviour started to occur. After an exception, 
> my ui:instanceView forms are polluted with "ui:systemProperty" values, such as
> 
> <ui:group ui:id="TOC" ui:systemProperty="[Cannot render blank node 
> 3dd239af:12e7b014c9c:-2e7c]">
>     <li ui:systemProperty="[Cannot render blank node 
> 3dd239af:12e7b014c9c:-2e7b]">
>         <v:LocalLinkFromResource tui:resource="{= ?this }" 
> tui:systemProperty="{= ?this }" ui:systemProperty="0"/>
>     </li>
> </ui:group>
> 
> These seem to persist until I remove them manually (which is quite tedious).
> Can I avoid or fix this more easily?
> 
> Peter
> 
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