Re: specifying process duration

Hi,

I am not sure, how correctly I have written this in terms of syntax, 
however here are a few enhancements I think that can be made to your 
description.

It may be an idea to specify the start and end time for any process, 
since duration can be internally inferenced from that as well.

<daml:class rdf ID:StartInstant>
        <rdfs:subClassOf rdf:resource= 
"http://www.ai.sri.com/daml/ontologies/time/Time.daml#Instant" />
    </daml:Class>

<daml:class rdf ID:EndInstant>
        <rdfs:subClassOf rdf:resource= 
"http://www.ai.sri.com/daml/ontologies/time/Time.daml#Instant" />
</daml:Class>

<rdf:Property rdf:ID="startAt">
  <rdfs:subPropertyOf rdf:resource="&process;#startTime"/>
  <rdfs:domain rdf:resource="&DEFAULT;#myprocess"/>
  <rdfs:range rdf:resource="&DEFAULT;#StartInstant"/>
</rdf:Property>

<rdf:Property rdf:ID="endAt">
  <rdfs:subPropertyOf rdf:resource="&process;#endTime"/>
  <rdfs:domain rdf:resource="&DEFAULT;#myprocess"/>
  <rdfs:range rdf:resource="&DEFAULT;#EndInstant"/>
</rdf:Property>

The TemporalDescription class in 
http://www.ai.sri.com/daml/ontologies/time/Time.daml can be used to 
further specify the details of the instants.

It might also be an idea to also specify the maximum and minimum 
execution time interval a
process may take, posssibly for synchronization with other processes

<time:Interval rdf:ID="MinDuration">
  <time:seconds><xsd:decimal rdf:value="5"/></time:seconds>
</time:Interval>

<time:Interval rdf:ID="MaxDuration">
  <time:seconds><xsd:decimal rdf:value="10"/></time:seconds>
</time:Interval>

<rdf:Property rdf:ID="minExecTime">
  <rdfs:subPropertyOf rdf:resource="&process;#during"/>
  <rdfs:domain rdf:resource="&DEFAULT;#myprocess"/>
  <rdfs:range rdf:resource="&default;#MinDuration"/>
</rdf:Property>

<rdf:Property rdf:ID="maxExecTime">
  <rdfs:subPropertyOf rdf:resource="&process;#during"/>
  <rdfs:domain rdf:resource="&DEFAULT;#myprocess"/>
  <rdfs:range rdf:resource="&default;#MaxDuration"/>
</rdf:Property>

Comments from  members of the list appreciated.

cheers,

Vera Zaychik wrote:

>
> Can someone suggest a good way to specify duration of a process? (Time 
> within which this process is going to finish).
>
> What I have right now is this:
>
> <time:Interval rdf:ID="SmallDuration">
>   <time:seconds><xsd:decimal rdf:value="5"/></time:seconds>
> </time:Interval>
>
> <rdf:Property rdf:ID="duration">
>   <rdfs:subPropertyOf rdf:resource="&process;#during"/>
>   <rdfs:domain rdf:resource="&DEFAULT;#myprocess"/>
>   <rdfs:range rdf:resource="&default;#SmallDuration"/>
> </rdf:Property>
>
> Thanks!
> Vera
>
> Vera Zaychik
> Lockheed Martin ATL
>
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