perfsonar development work

[Yee-Ting Li <>]

Hi,

we're in the process of defining a schema for our PingER suite which  
we plan to use for digital divide measurements and lhc-opn  
performance measurements. the PingER suite is basically a statistical  
subset of ping measurements.

We would like the ability to be able to query for statistical  
information as part of the xml document; ie using the 'select'  
namespace. unfortunately, the example schemas in the perfsonar svn do  
not answer my questions wholly.

so from the examples, we can define a metadata block with:

    <select:parameters id="#select1">
      <nmwg:parameter name="timeValue">
        <nmwg:parameter name="lessThan">1107492207</nmwg:parameter>
      </nmwg:parameter>
    </select:parameters>

 so, i would be interested in something like:

    <select:parameters id="#select2">
      <nmwg:parameter name="minRtt">
        <nmwg:parameter name="lessThan">5.0</nmwg:parameter>
      </nmwg:parameter>
    </select:parameters>

Assuming that we have a schema in place for the pinger info such that:

PingERDatum =
          element pinger:datum {
                  attribute name { "minRtt" | "maxRtt" | "meanRtt" |  
"medianRtt" |
                                   "lossPercent" |
                                   "minIpd" | "maxIpd" | "ipdv" |  
"duplicatePercent" } &
                  attribute value { xsd:float } &
                  attribute valueUnits { xsd:string }? &
                  (
                          (
                                  attribute timeType { xsd:string } &
                                  attribute timeValue { xsd:string }
                          ) |
                          Time
                  )?
          }

how does one map the selected parameter 'name' (minRtt) to that of  
the datum where

  <nmwg:data>
    <pinger:datum name="minRtt" value="4.9" valueUnits="msec"/>
  </nmwg:data>

ie how does one know that the minRtt in the select statement refers  
to the above element? where is the namespace mapping? how can i  
qualify the select with the  attribute 'valueUnits's value?


Thanks,

Yee.