perfsonar development work

[Roman Lapacz <>]

Jason Zurawski wrote:
> Hey Roman;
>
> > How could we indicate that the first filtering parameters 
> > (meta2select) use unix time type and the second one (meta4select) use 
> > ISO 8601. Now we have high level parameter timeType (see attachment)
> >
> >  <nmwg:parameters id="msgparam1">
> >    <nmwg:parameter name="timeType">unix</nmwg:parameter>
> >  </nmwg:parameters>
>
>
> I see from the example that this is at the message level, which works 
> but in my opinion is not ideal.
>
> > We might add new parameter into filtering parameters' metadata, example:
> >
> >  <nmwg:metadata id="meta2select">
> >    <select:subject id="iusub2" metadataIdRef="meta1"/>
> >    <select:parameters id="param1">
> >      <nmwg:parameter name="startTime">1121472000</nmwg:parameter>
> >      <nmwg:parameter name="endTime">1121904000</nmwg:parameter>
> >      <nmwg:parameter 
> > name="consolidationFunction">AVERAGE</nmwg:parameter>
> >      <nmwg:parameter name="resolution">60</nmwg:parameter>
> >      <nmwg:parameter name="timeType">unix</nmwg:parameter>
> >    </select:parameters>
> >    
> > <nmwg:eventType>http://ggf.org/ns/nmwg/ops/select/2.0</nmwg:eventType>
> >  </nmwg:metadata>
> >
> >
> > what do you think? Maybe there is more general approach?
>
> I think this is a good use of a parameter (and because it is specific 
> for this particular implementation it shouldn't affect any other 
> service).  I am not sure if it should be in the select parameter 
> block, along with other RRD specific parameters however.  The time 
> type is an external modification to the data presentation, the CF, 
> resolution and start/end times are sent to the RRD libraries.

good point

> It could be in a seperate parameter block:
>
> <nmwg:parameters>
>  <nmwg:parameter name="timeType">unix</nmwg:parameter>
> </nmwg:parameters>
> <select:parameters>
>  <select:parameter ... />
> </select:parameters>

but you can not have two parameters elements in the same metadata


Metadata =
       element nmwg:metadata {
               (
                       Identifier &
                       MetadataIdentifierRef? &
                       MetadataContent
               ),
               anyElement*
       }

MetadataBlock =
       Subject? &
       Parameters?

MetadataContent =
       (
               MetadataBlock |
               FilterMetadataBlock
       ) &
       EventType? &
       Key?




Roman


> -jason