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Creating a dynamic,
data-driven
profession-skills ontology
Kasper Kok, PhD
Textkernel
OJA forum 2022-05-09
International market leader in AI for HR and Recruiting
Founded in 2001│ Headquarter in Amsterdam│1.000+ clients worldwide | 145
full-time employees, majority R&D and development
Machine Intelligence for
Matching People and Jobs
AI and Machine Learning
Semantic Search and Match
Document Understanding
Web Mining
Labor Market Intelligence
3 | CONFIDENTIAL AND PRIVILEGED
4 | CONFIDENTIAL AND PRIVILEGED
Jobfeed
Web spider scraper parser
Vacancy Parsing
Job
Description
Section
Requirements
Section
Benefits
Section
Company info
Section
Segmenting
Years experience
IT skills
Education
Offer details
Salary
Additional info
Vacancy title
Extraction Normalization
Skill ID = 123
Profession ID = ABC
Seniority = Medior
Profession-skill knowledge graph
6 | CONFIDENTIAL AND PRIVILEGED
Requirements for skill (and job title) extraction
7 | CONFIDENTIAL AND PRIVILEGED
Requirements
Clean data
(control over what is extracted)
Deal with ambiguity
Stay up to date
(discover new skills)
Skill list
Excel
Word
Access
PS5
Steam Cloud
Virtual Reality
VR
Augmented Reality
Roblox
MoCap
Pathfinding
Ray Tracing
Procedural
Generation
List-based skill extraction (closed world)
8 | CONFIDENTIAL AND PRIVILEGED
As an experienced virtual reality developer within the Virtual Reality
team, you will be responsible enabling access to industry leading,
commercial VR applications.
Your day to day will involve working with code leads and members of
other disciplines to plan, research, and implement new features while
maintaining and debugging existing codebases. You will write clean,
coherent code and participate in regular code reviews. You will be
comfortable working with pathfinding algorithms and make innovative
improvements.
Knowledge of Visual F# is preferred.
Requirements for skill extraction
9 | CONFIDENTIAL AND PRIVILEGED
Requirements Closed world
(list-based)
Clean data
(control over what is extracted)
Deal with ambiguity
Stay up to date
(discover new skills)
Data collection Model Training Classification
Context-based skill extraction (open world approach)
Output:
Date Job
Company
Input:
1977 Human
Resources Generalist
at Avenet Inc
Looking for a creative person
Will you join our social media marketing team?
You will be working with hot new programming languages such as Visual F#
Finding skills based on contexts
11 | CONFIDENTIAL AND PRIVILEGED
These look like skills!
experienced
those used in ..
remote
Requirements for skill extraction
12 | CONFIDENTIAL AND PRIVILEGED
Requirements Closed world
(list-based)
Open world
(context-based)
Clean data
(control over what is extracted)
Deal with ambiguity
Stay up to date
(discover new skills)
Best of both worlds
13 | CONFIDENTIAL AND PRIVILEGED
Date Job
Skill Skill
Skills taxonomy
Offline:
Taxonomy enrichment
based on ‘open world’
methods
As an experienced
virtual reality developer
you will help providing
access to …
As an experienced
virtual reality developer
you will help providing
access to …
Online (during parsing):
‘Closed world’ extraction +
ML-based context validation
kok@textkernel.com
Thank you!

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OJA_Forum_Kasper_Kok_Textkernel.pdf

  • 1. Creating a dynamic, data-driven profession-skills ontology Kasper Kok, PhD Textkernel OJA forum 2022-05-09
  • 2. International market leader in AI for HR and Recruiting Founded in 2001│ Headquarter in Amsterdam│1.000+ clients worldwide | 145 full-time employees, majority R&D and development Machine Intelligence for Matching People and Jobs AI and Machine Learning Semantic Search and Match Document Understanding Web Mining Labor Market Intelligence
  • 3. 3 | CONFIDENTIAL AND PRIVILEGED
  • 4. 4 | CONFIDENTIAL AND PRIVILEGED Jobfeed Web spider scraper parser
  • 5. Vacancy Parsing Job Description Section Requirements Section Benefits Section Company info Section Segmenting Years experience IT skills Education Offer details Salary Additional info Vacancy title Extraction Normalization Skill ID = 123 Profession ID = ABC Seniority = Medior
  • 6. Profession-skill knowledge graph 6 | CONFIDENTIAL AND PRIVILEGED
  • 7. Requirements for skill (and job title) extraction 7 | CONFIDENTIAL AND PRIVILEGED Requirements Clean data (control over what is extracted) Deal with ambiguity Stay up to date (discover new skills)
  • 8. Skill list Excel Word Access PS5 Steam Cloud Virtual Reality VR Augmented Reality Roblox MoCap Pathfinding Ray Tracing Procedural Generation List-based skill extraction (closed world) 8 | CONFIDENTIAL AND PRIVILEGED As an experienced virtual reality developer within the Virtual Reality team, you will be responsible enabling access to industry leading, commercial VR applications. Your day to day will involve working with code leads and members of other disciplines to plan, research, and implement new features while maintaining and debugging existing codebases. You will write clean, coherent code and participate in regular code reviews. You will be comfortable working with pathfinding algorithms and make innovative improvements. Knowledge of Visual F# is preferred.
  • 9. Requirements for skill extraction 9 | CONFIDENTIAL AND PRIVILEGED Requirements Closed world (list-based) Clean data (control over what is extracted) Deal with ambiguity Stay up to date (discover new skills)
  • 10. Data collection Model Training Classification Context-based skill extraction (open world approach) Output: Date Job Company Input: 1977 Human Resources Generalist at Avenet Inc
  • 11. Looking for a creative person Will you join our social media marketing team? You will be working with hot new programming languages such as Visual F# Finding skills based on contexts 11 | CONFIDENTIAL AND PRIVILEGED These look like skills! experienced those used in .. remote
  • 12. Requirements for skill extraction 12 | CONFIDENTIAL AND PRIVILEGED Requirements Closed world (list-based) Open world (context-based) Clean data (control over what is extracted) Deal with ambiguity Stay up to date (discover new skills)
  • 13. Best of both worlds 13 | CONFIDENTIAL AND PRIVILEGED Date Job Skill Skill Skills taxonomy Offline: Taxonomy enrichment based on ‘open world’ methods As an experienced virtual reality developer you will help providing access to … As an experienced virtual reality developer you will help providing access to … Online (during parsing): ‘Closed world’ extraction + ML-based context validation