Re: [oslc-promcode] Comments on Proposed Change to Measure

[Arthur Ryman <ryman@ca.ibm.com>]

Wakao-san,

Yes, using URIs for the metric and the units is more aligned with Linked 
Data design principles. I  believe that are now less differences between 
PROMCODE and EMS.

The OSLC EMS spec defines URIs for units of measure and other related 
concepts. See [1]. I recommend that PROMCODE use those URIs and the 
associated EMS vocabulary terms. At the next meeting I will describe the 
OSLC EMS vocabulary.

EMS defines many types of metrics. In your example, you are measuring 
size. ems:SizeMetric is the class of size metrics. It contains the metric 
metric:Sloc for source lines of code (SLOC). The other size metrics are 
Effective SLOC, Function Points, Story Points, Use Case Points, and Ideal 
Days. Other types of size metric can be defined. 

You can measure SLOC in lines of loc (unit:Loc), and thousand lines of 
code (unit:Kloc). 

EMS defines the type ems:Measure [2]. Suppose that a UI module has 5 KLOC. 
In EMS the RDF in Turtle is:

<#ui-module-sloc-measure> a ems:Measure ;
        dcterms:title "Source lines of code size of UI module measured in 
KLOC" ;
        ems:metric metric:Sloc ;
        ems:unitOfMeasure unit:Kloc ;
        ems:numericValue 5 .

The benefit of PROMCODE adopting terms from EMS is that other OSLC 
specifications also may use measurement concepts. It makes sense for all 
OSLC specifications to use a common vocabulary. For example, OSLC 
Performance Monitoring has adopted EMS. See [3].

EMS has been in the Convergence stage for a long time. We need to get more 
feedback from other specifications. This means that if PROMCODE has other 
requirements, we can modify EMS.

[1] 
http://open-services.net/wiki/estimation-and-measurement/EMS-1.0-REST-API-Standard-URIs/
[2] http://open-services.net/bin/view/Main/MetricsEmsMeasure
[3] 
http://open-services.net/wiki/performance-monitoring/OSLC-Performance-Monitoring-Specification-Version-2.0/#Resource.3A-ems.3AMeasure


Regards, 
___________________________________________________________________________
Arthur Ryman, PhD

Chief Data Officer, Rational
Chief Architect, Portfolio & Strategy Management
Distinguished Engineer | Master Inventor | Academy of Technology

Toronto Lab | +1-905-413-3077 (office) | +1-416-939-5063 (mobile)





From:   Masaki Wakao <WAKAO@jp.ibm.com>
To:     oslc-promcode@lists.oasis-open.org, 
Date:   08/13/2014 02:21 AM
Subject:        Re: [oslc-promcode] Comments on Proposed Change to Measure
Sent by:        <oslc-promcode@lists.oasis-open.org>



Hi Arthur,

Thank you for your comment.
After we have discussed about this topic, we are now thinking that using
URI instead of String might be a better way. We also think that rdf:type
will be used instead of dcterms:type to express the extended type of each
resource type in PROMCODE.
For example, if a user wants to use a Measure with type="code size" and 
the
unit="kloc". The resource can be expressed like:

<promcode:Measure>
   <rdf:type rdf:resource="http://aaa.com/pm#CodeSize"/>
   <promocode:unit rdf:resource="http://aaa.com/pm#Kloc"/>
    ...
</promcode:Measure>

The resource has two rdf types Measure and CodeSize so that the client can
understand the actual meaning of the resource. The same usage of rdf:type
will be used for other types like ScopeItem.
Please let us know your thought. We are still discussing this topic and
would like to get the final decision at the next call on August 19.

regards
Masaki Wakao (若尾 正樹)
STSM, Rational Development, Tokyo Software Development Laboratory, SWG, 
IBM
E-Mail: wakao@jp.ibm.com Phone: 080-6706-8299 (Tie: 206-8299)



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