Requirements Engineering

An OSLC-based approach for UC 2.3 and 2.4

Jose María Alvarez-Rodríguez, Juan Llorens and Jose Fuentes

CRYSTAL Workshop, Munich, 12-0-2015

The Use Cases...

Knowledge Management

 Requirements Quality Checking

 Contributions

OSLC KPIs->OSLC EMS*

OSLC KM

Knowledge Management

RAT
RQA
kM

Requirements Authoring Tool

Requirements Quality Analyzer

knowledgeMANAGER

Tools by TRC

OSLC Overview

Situating contributions...

OSLC Overview

Situated contributions...

KPIs

• Indicators for requirements quality
• 58
• Compile: dimensions, units of measurement, etc.

Observations

• Observations linked to a KPI
• A value under a context
  • Time
  • ...

OSLC KPIs 

Application to requirements quality management

OSLC Defined Resources

• Based on qb:Dataset and qb:Observation
  • W3C Recommendation RDF Data Cube
• Ios_kpi:KPI & Ios_kpi:Observation

Scenarios...

1-Checking the quality of a text-based requirement

2-Checking the quality of an OSLC-based requirement

3-Checking the quality of an OSLC-based requirement and a Jazz Widget

Summary

OSLC KPIs-Key Performance Indicators

• Use of the W3C RDF Data Cube Vocabulary
• KPIs and Observations are the entities to be exchanged 
• Need to merge with OSLC-EMS.

KPIs+Observation

Artifact

On-going Work

Merge with OSLC EMS

(Estimation and Measurement)

Vocabulary

& Conceptual Model

• Normalization
• Standardization
• Suggestions
• X Breakdown Structures
• ...

Patterns

• Restrictions
• Examples
• Suggestions

Knowledge Management

Application to requirements authoring and requirements quality management

OSLC Defined Resources

• Based on skos:Concept 
  • W3C Recommendation SKOS (Simple Knowledge Organization System)
• Ios_Km:Concept

Scenarios...

1-Listing the concepts of a domain vocabulary

2-Standardize a term or text-based description

3-Get synonyms for a term or a text-based description

4-Get the list of patterns to guide the writing of requirements

Real Example

SKOS Concepts through OSLC in CKEditor

Summary

OSLC KM-Knowledge management

• Use of the W3C SKOS vocabulary
• Concepts and relationships are the entities to be exchanged 
• Services for: search, trace, naming, visualize, etc.

Metadata+Contents

Artifact

oslc_asset:artifact

On-going work...

Process any kind of OSLC Resource or RDF data...

E.g. Modelica

Conclusions

• Two main action lines
  • Requirements Quality Metrics
  • Knowledge Management
• Keypoints:
  • Re-use of existing RDF vocabularies

• Good experience with OSLC4Net
  • Change in the JSON Serializer
• JSON format->better performance for large responses

OSLC Domains

Technical issues

Data modeling

• Need of logic formalism?
• Requirements quality metrics match OSLC EMS?
• Multilingual data in OSLC APIs
• On-line vs Reference vs Proxy resources
• ...

Infrastructure & Data integration

• Convergence OSLC and RDF Data Shapes, W3C LDP, etc.
• Joint efforts in OSLC specs. and new domains
• OSLC APIs in other languages
  • Microservices
• ...

• Federated queries and stream processing
• Trust and Privacy

OSLC applications

• Semantic Impact Analysis
• Risk Analysis
• Continuous Engineering
• ...